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<span class="kw">let </span><font color="Maroon" title="c1">i</font>, <font color="Maroon" title="c2">n</font> be   <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a>; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide">  for <font color="Olive" title="b1">C</font> being   <a href="connsp_1.html#V2" title="CONNSP_1:attr.2">connected</a>   <a href="compts_1.html#V2" title="COMPTS_1:attr.2">compact</a>   non  <a href="sppol_1.html#V1" title="SPPOL_1:attr.1">horizontal</a>   non  <a href="sppol_1.html#V2" title="SPPOL_1:attr.2">vertical</a>  <a href="struct_0.html#NM2" title="STRUCT_0:NM.2">Subset</a> of <span class="p1">(<span class="default"><a href="euclid.html#K15" title="EUCLID:func.15">TOP-REAL</a> 2</span>)</span><br/>  for <font color="Olive" title="b2">p</font>, <font color="Olive" title="b3">x</font> being   <a href="pre_topc.html#NM2" title="PRE_TOPC:NM.2">Point</a> of <span class="p1">(<span class="default"><a href="euclid.html#K15" title="EUCLID:func.15">TOP-REAL</a> 2</span>)</span>  st <font color="Olive" title="b3">x</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="pscomp_1.html#K16" title="PSCOMP_1:func.16">E-most</a> <font color="Olive" title="b1">C</font> &amp; <font color="Olive" title="b2">p</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="topreal1.html#K5" title="TOPREAL1:func.5">east_halfline</a> <font color="Olive" title="b3">x</font> &amp; 1 <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <font color="Maroon" title="c1">i</font> &amp; <font color="Maroon" title="c1">i</font> <a href="xxreal_0.html#NR3" title="XXREAL_0:NR.3">&lt;</a>  <a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Olive" title="b1">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> &amp; <font color="Olive" title="b2">p</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="topreal1.html#K2" title="TOPREAL1:func.2">LSeg</a> (<span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Olive" title="b1">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>,<font color="Maroon" title="c1">i</font>) holds <br/> <a href="topreal1.html#K2" title="TOPREAL1:func.2">LSeg</a> (<span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Olive" title="b1">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>,<font color="Maroon" title="c1">i</font>) is  <a href="sppol_1.html#V2" title="SPPOL_1:attr.2">vertical</a> </span><br/><span class="kw">let </span><font color="Maroon" title="c3">C</font> be   <a href="connsp_1.html#V2" title="CONNSP_1:attr.2">connected</a>   <a href="compts_1.html#V2" title="COMPTS_1:attr.2">compact</a>   non  <a href="sppol_1.html#V1" title="SPPOL_1:attr.1">horizontal</a>   non  <a href="sppol_1.html#V2" title="SPPOL_1:attr.2">vertical</a>  <a href="struct_0.html#NM2" title="STRUCT_0:NM.2">Subset</a> of <span class="p1">(<span class="default"><a href="euclid.html#K15" title="EUCLID:func.15">TOP-REAL</a> 2</span>)</span>; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide">  for <font color="Olive" title="b1">p</font>, <font color="Olive" title="b2">x</font> being   <a href="pre_topc.html#NM2" title="PRE_TOPC:NM.2">Point</a> of <span class="p1">(<span class="default"><a href="euclid.html#K15" title="EUCLID:func.15">TOP-REAL</a> 2</span>)</span>  st <font color="Olive" title="b2">x</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="pscomp_1.html#K16" title="PSCOMP_1:func.16">E-most</a> <font color="Maroon" title="c3">C</font> &amp; <font color="Olive" title="b1">p</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="topreal1.html#K5" title="TOPREAL1:func.5">east_halfline</a> <font color="Olive" title="b2">x</font> &amp; 1 <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <font color="Maroon" title="c1">i</font> &amp; <font color="Maroon" title="c1">i</font> <a href="xxreal_0.html#NR3" title="XXREAL_0:NR.3">&lt;</a>  <a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> &amp; <font color="Olive" title="b1">p</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="topreal1.html#K2" title="TOPREAL1:func.2">LSeg</a> (<span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>,<font color="Maroon" title="c1">i</font>) holds <br/> <a href="topreal1.html#K2" title="TOPREAL1:func.2">LSeg</a> (<span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>,<font color="Maroon" title="c1">i</font>) is  <a href="sppol_1.html#V2" title="SPPOL_1:attr.2">vertical</a> </span><br/><span class="kw">let </span><font color="Maroon" title="c4">p</font>, <font color="Maroon" title="c5">x</font> be   <a href="pre_topc.html#NM2" title="PRE_TOPC:NM.2">Point</a> of <span class="p1">(<span class="default"><a href="euclid.html#K15" title="EUCLID:func.15">TOP-REAL</a> 2</span>)</span>; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> ( <font color="Maroon" title="c5">x</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="pscomp_1.html#K16" title="PSCOMP_1:func.16">E-most</a> <font color="Maroon" title="c3">C</font> &amp; <font color="Maroon" title="c4">p</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="topreal1.html#K5" title="TOPREAL1:func.5">east_halfline</a> <font color="Maroon" title="c5">x</font> &amp; 1 <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <font color="Maroon" title="c1">i</font> &amp; <font color="Maroon" title="c1">i</font> <a href="xxreal_0.html#NR3" title="XXREAL_0:NR.3">&lt;</a>  <a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> &amp; <font color="Maroon" title="c4">p</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="topreal1.html#K2" title="TOPREAL1:func.2">LSeg</a> (<span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>,<font color="Maroon" title="c1">i</font>) implies  <a href="topreal1.html#K2" title="TOPREAL1:func.2">LSeg</a> (<span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>,<font color="Maroon" title="c1">i</font>) is  <a href="sppol_1.html#V2" title="SPPOL_1:attr.2">vertical</a>  )</span><br/>









<span class="kw">set </span><font color="Maroon" title="c6">G</font> =  <a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>);<br/>
<span class="kw">set </span><font color="Maroon" title="c7">f</font> =  <a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>);<br/>
<span class="kw">assume </span><span class="kw">that </span><br/><a NAME="E1:95"/><span class="lab"><font color="Green" title="E61">A1</font></span>: 
<font color="Maroon" title="c5">x</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="pscomp_1.html#K16" title="PSCOMP_1:func.16">E-most</a> <font color="Maroon" title="c3">C</font>
 <span class="kw">and </span><br/><a NAME="E2:95"/><span class="lab"><font color="Green" title="E62">A2</font></span>: 
<font color="Maroon" title="c4">p</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="topreal1.html#K5" title="TOPREAL1:func.5">east_halfline</a> <font color="Maroon" title="c5">x</font>
 <span class="kw">and </span><br/><a NAME="E3:95"/><span class="lab"><font color="Green" title="E63">A3</font></span>: 
1 <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <font color="Maroon" title="c1">i</font>
 <span class="kw">and </span><br/><a NAME="E4:95"/><span class="lab"><font color="Green" title="E64">A4</font></span>: 
<font color="Maroon" title="c1">i</font> <a href="xxreal_0.html#NR3" title="XXREAL_0:NR.3">&lt;</a>  <a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>
 <span class="kw">and </span><br/><a NAME="E5:95"/><span class="lab"><font color="Green" title="E65">A5</font></span>: 
<font color="Maroon" title="c4">p</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="topreal1.html#K2" title="TOPREAL1:func.2">LSeg</a> (<span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>,<font color="Maroon" title="c1">i</font>)
 ; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide">  <a href="topreal1.html#K2" title="TOPREAL1:func.2">LSeg</a> (<span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>,<font color="Maroon" title="c1">i</font>) is  <a href="sppol_1.html#V2" title="SPPOL_1:attr.2">vertical</a> </span><br/>

<span class="kw">assume </span><a NAME="E6:95"/><span class="lab"><font color="Green" title="E66">A6</font></span>: 
 not  <a href="topreal1.html#K2" title="TOPREAL1:func.2">LSeg</a> (<span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>,<font color="Maroon" title="c1">i</font>) is  <a href="sppol_1.html#V2" title="SPPOL_1:attr.2">vertical</a> 
 ; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> contradiction</span><br/>

<a NAME="E7:95"/><span class="lab"><font color="Green" title="E67">A7</font></span>: 
<font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1 <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a>  <a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>
 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E4:95"><span class="lab"><font color="Green" title="E64">A4</font></span></a>, <a class="ref" href="nat_1.html#T13" onmouseover="rs('nat_1/T13')" onmouseout="rh()">NAT_1:13</a></span>;<br/>
<a NAME="E8:95"/><span class="kw">then </span><span class="lab"><font color="Green" title="E68">A8</font></span>: 
 <a href="topreal1.html#K2" title="TOPREAL1:func.2">LSeg</a> (<span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>,<font color="Maroon" title="c1">i</font>) <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="rltopsp1.html#K1" title="RLTOPSP1:func.1">LSeg</a> (<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font></span>)</span>,<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p2">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span></span>)</span>)
 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E3:95"><span class="lab"><font color="Green" title="E63">A3</font></span></a>, <a class="ref" href="topreal1.html#D3" onmouseover="rs('topreal1/D3')" onmouseout="rh()">TOPREAL1:def 3</a></span>;<br/>
<a NAME="E9:95"/>
1 <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1
 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E3:95"><span class="lab"><font color="Green" title="E63">A3</font></span></a>, <a class="ref" href="nat_1.html#T13" onmouseover="rs('nat_1/T13')" onmouseout="rh()">NAT_1:13</a></span>;<br/>
<a NAME="E10:95"/><span class="kw">then </span>
<font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1 <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="finseq_1.html#K2" title="FINSEQ_1:func.2">Seg</a> <span class="p1">(<span class="default"><a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span></span>)</span>
 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E7:95"><span class="lab"><font color="Green" title="E67">A7</font></span></a>, <a class="ref" href="finseq_1.html#T1" onmouseover="rs('finseq_1/T1')" onmouseout="rh()">FINSEQ_1:1</a></span>;<br/>
<a NAME="E11:95"/><span class="kw">then </span><span class="lab"><font color="Green" title="E69">A9</font></span>: 
<font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1 <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="finseq_1.html#K4" title="FINSEQ_1:func.4">dom</a> <span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="finseq_1.html#D3" onmouseover="rs('finseq_1/D3')" onmouseout="rh()">FINSEQ_1:def 3</a></span>;<br/>
<a NAME="E12:95"/>
<font color="Maroon" title="c1">i</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="finseq_1.html#K2" title="FINSEQ_1:func.2">Seg</a> <span class="p1">(<span class="default"><a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span></span>)</span>
 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E3:95"><span class="lab"><font color="Green" title="E63">A3</font></span></a>, <a class="txt" href="#E4:95"><span class="lab"><font color="Green" title="E64">A4</font></span></a>, <a class="ref" href="finseq_1.html#T1" onmouseover="rs('finseq_1/T1')" onmouseout="rh()">FINSEQ_1:1</a></span>;<br/>
<a NAME="E13:95"/><span class="kw">then </span><span class="lab"><font color="Green" title="E70">A10</font></span>: 
<font color="Maroon" title="c1">i</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="finseq_1.html#K4" title="FINSEQ_1:func.4">dom</a> <span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="finseq_1.html#D3" onmouseover="rs('finseq_1/D3')" onmouseout="rh()">FINSEQ_1:def 3</a></span>;<br/>
<a NAME="E14:95"/>
<font color="Maroon" title="c4">p</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="topreal1.html#K3" title="TOPREAL1:func.3">L~</a> <span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>
 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:95"><span class="lab"><font color="Green" title="E65">A5</font></span></a>, <a class="ref" href="sppol_2.html#T17" onmouseover="rs('sppol_2/T17')" onmouseout="rh()">SPPOL_2:17</a></span>;<br/>
<a NAME="E15:95"/><span class="kw">then </span><span class="lab"><font color="Green" title="E71">A11</font></span>: 
<font color="Maroon" title="c4">p</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a> <span class="p1">(<span class="default"><a href="topreal1.html#K5" title="TOPREAL1:func.5">east_halfline</a> <font color="Maroon" title="c5">x</font></span>)</span> <a href="subset_1.html#K9" title="SUBSET_1:func.9">/\</a> <span class="p1">(<span class="default"><a href="topreal1.html#K3" title="TOPREAL1:func.3">L~</a> <span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span></span>)</span>
 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E2:95"><span class="lab"><font color="Green" title="E62">A2</font></span></a>, <a class="ref" href="xboole_0.html#D4" onmouseover="rs('xboole_0/D4')" onmouseout="rh()">XBOOLE_0:def 4</a></span>;<br/>
<a NAME="E16:95"/><span class="lab"><font color="Green" title="E72">A12</font></span>: 
 <a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>) <a href="goboard1.html#R1" title="GOBOARD1:pred.1">is_sequence_on</a>  <a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="jordan9.html#D1" onmouseover="rs('jordan9/D1')" onmouseout="rh()">JORDAN9:def 1</a></span>;<br/>
<span class="lab"><font color="Green" title="E73">A13</font></span>: <font color="Maroon" title="c5">x</font> <a href="euclid.html#K18" title="EUCLID:func.18">`2</a>  = 
<font color="Maroon" title="c4">p</font> <a href="euclid.html#K18" title="EUCLID:func.18">`2</a> 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E2:95"><span class="lab"><font color="Green" title="E62">A2</font></span></a>, <a class="ref" href="topreal1.html#D11" onmouseover="rs('topreal1/D11')" onmouseout="rh()">TOPREAL1:def 11</a></span>
<br/>.= 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font></span>)</span> <a href="euclid.html#K18" title="EUCLID:func.18">`2</a> 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:95"><span class="lab"><font color="Green" title="E65">A5</font></span></a>, <a class="txt" href="#E8:95"><span class="lab"><font color="Green" title="E68">A8</font></span></a>, <a class="txt" href="#E6:95"><span class="lab"><font color="Green" title="E66">A6</font></span></a>, <a class="ref" href="sppol_1.html#T19" onmouseover="rs('sppol_1/T19')" onmouseout="rh()">SPPOL_1:19</a>, <a class="ref" href="sppol_1.html#T40" onmouseover="rs('sppol_1/T40')" onmouseout="rh()">SPPOL_1:40</a></span>
;<br/>
<span class="lab"><font color="Green" title="E74">A14</font></span>: <font color="Maroon" title="c5">x</font> <a href="euclid.html#K18" title="EUCLID:func.18">`2</a>  = 
<font color="Maroon" title="c4">p</font> <a href="euclid.html#K18" title="EUCLID:func.18">`2</a> 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E2:95"><span class="lab"><font color="Green" title="E62">A2</font></span></a>, <a class="ref" href="topreal1.html#D11" onmouseover="rs('topreal1/D11')" onmouseout="rh()">TOPREAL1:def 11</a></span>
<br/>.= 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p2">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span></span>)</span> <a href="euclid.html#K18" title="EUCLID:func.18">`2</a> 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:95"><span class="lab"><font color="Green" title="E65">A5</font></span></a>, <a class="txt" href="#E8:95"><span class="lab"><font color="Green" title="E68">A8</font></span></a>, <a class="txt" href="#E6:95"><span class="lab"><font color="Green" title="E66">A6</font></span></a>, <a class="ref" href="sppol_1.html#T19" onmouseover="rs('sppol_1/T19')" onmouseout="rh()">SPPOL_1:19</a>, <a class="ref" href="sppol_1.html#T40" onmouseover="rs('sppol_1/T40')" onmouseout="rh()">SPPOL_1:40</a></span>
;<br/>
<a NAME="E19:95"/><span class="lab"><font color="Green" title="E75">A15</font></span>: 
 <a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="matrix_0.html#K1" title="MATRIX_0:func.1">width</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="jordan8.html#D1" onmouseover="rs('jordan8/D1')" onmouseout="rh()">JORDAN8:def 1</a></span>;<br/>
<a NAME="E20:95"/><span class="kw">then </span><span class="lab"><font color="Green" title="E76">A16</font></span>: 
<span class="p1">(<span class="default"><a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p2">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span></span>)</span> <a href="nat_d.html#K7" title="NAT_D:func.7">-'</a> 1 <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a>  <a href="matrix_0.html#K1" title="MATRIX_0:func.1">width</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="nat_d.html#T35" onmouseover="rs('nat_d/T35')" onmouseout="rh()">NAT_D:35</a></span>;<br/>
<a NAME="E21:95"/><span class="lab"><font color="Green" title="E77">A17</font></span>: 
<font color="Maroon" title="c5">x</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a> <font color="Maroon" title="c3">C</font>
 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E1:95"><span class="lab"><font color="Green" title="E61">A1</font></span></a>, <a class="ref" href="xboole_0.html#D4" onmouseover="rs('xboole_0/D4')" onmouseout="rh()">XBOOLE_0:def 4</a></span>;<br/>
<div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="95_3"><span class="kw">per </span></a><a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="kw">cases </span></a><span class="hide"><a NAME="E1:95_3"/>
( <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p2">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  or <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  <a href="xxreal_0.html#NR2" title="XXREAL_0:NR.2">&gt;=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p2">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  )
 </span>;<br/><div class="add"><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="95_3_1"><span class="kw">suppose </span></a><a NAME="E1:95_3_1"/><span class="lab"><font color="Green" title="E78">A18</font></span>: 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p2">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> 
 ; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> contradiction</span><br/><div class="add"><a NAME="E2:95_3_1"/><span class="kw">then </span>
<font color="Maroon" title="c4">p</font> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p2">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> 
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:95"><span class="lab"><font color="Green" title="E65">A5</font></span></a>, <a class="txt" href="#E8:95"><span class="lab"><font color="Green" title="E68">A8</font></span></a>, <a class="ref" href="topreal1.html#T3" onmouseover="rs('topreal1/T3')" onmouseout="rh()">TOPREAL1:3</a></span>;<br/><a NAME="E3:95_3_1"/><span class="kw">then </span><span class="lab"><font color="Green" title="E79">A19</font></span>: 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p2">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  <a href="xxreal_0.html#NR4" title="XXREAL_0:NR.4">&gt;</a> <font color="Maroon" title="c5">x</font> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> 
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E21:95"><span class="lab"><font color="Green" title="E77">A17</font></span></a>, <a class="txt" href="#E15:95"><span class="lab"><font color="Green" title="E71">A11</font></span></a>, <a class="ref" href="jordan1a.html#T75" target="_self" onmouseover="rs('jordan1a/T75')" onmouseout="rh()">Th75</a>, <a class="ref" href="xxreal_0.html#T2" onmouseover="rs('xxreal_0/T2')" onmouseout="rh()">XXREAL_0:2</a></span>;<br/><span class="kw">consider </span><font color="Maroon" title="c8">i1</font>, <font color="Maroon" title="c9">i2</font> being   <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a><span class="kw"> such that </span><br/><a NAME="E5:95_3_1"/><span class="lab"><font color="Green" title="E80">A20</font></span>: 
<span class="p1"><a href="tarski.html#K4" title="TARSKI:func.4">[</a><span class="default"><font color="Maroon" title="c8">i1</font>,<font color="Maroon" title="c9">i2</font></span><a href="tarski.html#K4" title="TARSKI:func.4">]</a></span> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="matrix_0.html#K2" title="MATRIX_0:func.2">Indices</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>
 <span class="kw">and </span><br/><a NAME="E6:95_3_1"/><span class="lab"><font color="Green" title="E81">A21</font></span>: 
<span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="matrix_0.html#K3" title="MATRIX_0:func.3">*</a> (<font color="Maroon" title="c8">i1</font>,<font color="Maroon" title="c9">i2</font>)
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E16:95"><span class="lab"><font color="Green" title="E72">A12</font></span></a>, <a class="txt" href="#E11:95"><span class="lab"><font color="Green" title="E69">A9</font></span></a>, <a class="ref" href="goboard1.html#D9" onmouseover="rs('goboard1/D9')" onmouseout="rh()">GOBOARD1:def 9</a></span>;<br/><a NAME="E7:95_3_1"/><span class="lab"><font color="Green" title="E82">A22</font></span>: 
( 1 <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <font color="Maroon" title="c9">i2</font> &amp; <font color="Maroon" title="c9">i2</font> <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a>  <a href="matrix_0.html#K1" title="MATRIX_0:func.1">width</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> )
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:95_3_1"><span class="lab"><font color="Green" title="E80">A20</font></span></a>, <a class="ref" href="matrix_0.html#T32" onmouseover="rs('matrix_0/T32')" onmouseout="rh()">MATRIX_0:32</a></span>;<br/><span class="kw">consider </span><font color="Maroon" title="c10">j1</font>, <font color="Maroon" title="c11">j2</font> being   <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a><span class="kw"> such that </span><br/><a NAME="E9:95_3_1"/><span class="lab"><font color="Green" title="E83">A23</font></span>: 
<span class="p1"><a href="tarski.html#K4" title="TARSKI:func.4">[</a><span class="default"><font color="Maroon" title="c10">j1</font>,<font color="Maroon" title="c11">j2</font></span><a href="tarski.html#K4" title="TARSKI:func.4">]</a></span> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="matrix_0.html#K2" title="MATRIX_0:func.2">Indices</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>
 <span class="kw">and </span><br/><a NAME="E10:95_3_1"/><span class="lab"><font color="Green" title="E84">A24</font></span>: 
<span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="matrix_0.html#K3" title="MATRIX_0:func.3">*</a> (<font color="Maroon" title="c10">j1</font>,<font color="Maroon" title="c11">j2</font>)
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E16:95"><span class="lab"><font color="Green" title="E72">A12</font></span></a>, <a class="txt" href="#E13:95"><span class="lab"><font color="Green" title="E70">A10</font></span></a>, <a class="ref" href="goboard1.html#D9" onmouseover="rs('goboard1/D9')" onmouseout="rh()">GOBOARD1:def 9</a></span>;<br/><a NAME="E11:95_3_1"/><span class="lab"><font color="Green" title="E85">A25</font></span>: 
( 1 <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <font color="Maroon" title="c11">j2</font> &amp; <font color="Maroon" title="c11">j2</font> <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a>  <a href="matrix_0.html#K1" title="MATRIX_0:func.1">width</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> )
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E9:95_3_1"><span class="lab"><font color="Green" title="E83">A23</font></span></a>, <a class="ref" href="matrix_0.html#T32" onmouseover="rs('matrix_0/T32')" onmouseout="rh()">MATRIX_0:32</a></span>;<br/><a NAME="E12:95_3_1"/><span class="lab"><font color="Green" title="E86">A26</font></span>: 
<font color="Maroon" title="c8">i1</font> <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a>  <a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:95_3_1"><span class="lab"><font color="Green" title="E80">A20</font></span></a>, <a class="ref" href="matrix_0.html#T32" onmouseover="rs('matrix_0/T32')" onmouseout="rh()">MATRIX_0:32</a></span>;<br/><a NAME="E13:95_3_1"/><span class="lab"><font color="Green" title="E87">A27</font></span>: 
1 <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <font color="Maroon" title="c8">i1</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:95_3_1"><span class="lab"><font color="Green" title="E80">A20</font></span></a>, <a class="ref" href="matrix_0.html#T32" onmouseover="rs('matrix_0/T32')" onmouseout="rh()">MATRIX_0:32</a></span>;<br/><div><a class="txt" onmouseover="tooltip.show('hs2',this)" onmouseout="tooltip.hide()" onclick="hs2(this)" href="javascript:()" title="95_3_1_1"><span class="kw">now </span> <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide">  not <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p2">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> </span></a><div class="add"><span class="kw">assume </span><a NAME="E1:95_3_1_1"/>
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p2">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> 
 ; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> contradiction</span><br/><a NAME="E2:95_3_1_1"/><span class="kw">then </span><span class="lab"><font color="Green" title="E88">A28</font></span>: 
<span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E18:95"><span class="lab"><font color="Green" title="E74">A14</font></span></a>, <a class="txt" href="#E17:95"><span class="lab"><font color="Green" title="E73">A13</font></span></a>, <a class="ref" href="topreal3.html#T6" onmouseover="rs('topreal3/T6')" onmouseout="rh()">TOPREAL3:6</a></span>;<br/><a NAME="E3:95_3_1_1"/><span class="kw">then </span><span class="lab"><font color="Green" title="E89">A29</font></span>: 
<font color="Maroon" title="c9">i2</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c11">j2</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:95_3_1"><span class="lab"><font color="Green" title="E80">A20</font></span></a>, <a class="txt" href="#E6:95_3_1"><span class="lab"><font color="Green" title="E81">A21</font></span></a>, <a class="txt" href="#E9:95_3_1"><span class="lab"><font color="Green" title="E83">A23</font></span></a>, <a class="txt" href="#E10:95_3_1"><span class="lab"><font color="Green" title="E84">A24</font></span></a>, <a class="ref" href="goboard1.html#T5" onmouseover="rs('goboard1/T5')" onmouseout="rh()">GOBOARD1:5</a></span>;<br/><a NAME="E4:95_3_1_1"/>
( <font color="Maroon" title="c8">i1</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c10">j1</font> &amp; <span class="p1"><a href="complex1.html#K9" title="COMPLEX1:func.9">|.</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c8">i1</font> <a href="xcmplx_0.html#K6" title="XCMPLX_0:func.6">-</a> <font color="Maroon" title="c10">j1</font></span>)</span></span><a href="complex1.html#K9" title="COMPLEX1:func.9">.|</a></span> <a href="xcmplx_0.html#K2" title="XCMPLX_0:func.2">+</a> <span class="p1"><a href="complex1.html#K9" title="COMPLEX1:func.9">|.</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c9">i2</font> <a href="xcmplx_0.html#K6" title="XCMPLX_0:func.6">-</a> <font color="Maroon" title="c11">j2</font></span>)</span></span><a href="complex1.html#K9" title="COMPLEX1:func.9">.|</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> 1 )
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E16:95"><span class="lab"><font color="Green" title="E72">A12</font></span></a>, <a class="txt" href="#E13:95"><span class="lab"><font color="Green" title="E70">A10</font></span></a>, <a class="txt" href="#E11:95"><span class="lab"><font color="Green" title="E69">A9</font></span></a>, <a class="txt" href="#E5:95_3_1"><span class="lab"><font color="Green" title="E80">A20</font></span></a>, <a class="txt" href="#E6:95_3_1"><span class="lab"><font color="Green" title="E81">A21</font></span></a>, <a class="txt" href="#E9:95_3_1"><span class="lab"><font color="Green" title="E83">A23</font></span></a>, <a class="txt" href="#E10:95_3_1"><span class="lab"><font color="Green" title="E84">A24</font></span></a>, <a class="txt" href="#E2:95_3_1_1"><span class="lab"><font color="Green" title="E88">A28</font></span></a>, <a class="ref" href="goboard1.html#T5" onmouseover="rs('goboard1/T5')" onmouseout="rh()">GOBOARD1:5</a>, <a class="ref" href="goboard1.html#D9" onmouseover="rs('goboard1/D9')" onmouseout="rh()">GOBOARD1:def 9</a></span>;<br/><span class="kw">then </span>1 = 
<a href="numbers.html#K5" title="NUMBERS:func.5">0</a> <a href="xcmplx_0.html#K2" title="XCMPLX_0:func.2">+</a> <span class="p1"><a href="complex1.html#K9" title="COMPLEX1:func.9">|.</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c9">i2</font> <a href="xcmplx_0.html#K6" title="XCMPLX_0:func.6">-</a> <font color="Maroon" title="c11">j2</font></span>)</span></span><a href="complex1.html#K9" title="COMPLEX1:func.9">.|</a></span>
<span class="kw">by</span> <span class="lab"><a class="ref" href="goboard7.html#T2" onmouseover="rs('goboard7/T2')" onmouseout="rh()">GOBOARD7:2</a></span>
<br/>.= 
<a href="numbers.html#K5" title="NUMBERS:func.5">0</a> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> <a href="numbers.html#K5" title="NUMBERS:func.5">0</a>
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E3:95_3_1_1"><span class="lab"><font color="Green" title="E89">A29</font></span></a>, <a class="ref" href="goboard7.html#T2" onmouseover="rs('goboard7/T2')" onmouseout="rh()">GOBOARD7:2</a></span>
;<br/><span class="kw">hence </span><a NAME="E6:95_3_1_1"/>
contradiction
 ; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> verum</span><br/></div><span class="kw">end;</span></div><a NAME="E15:95_3_1"/><span class="kw">then </span><span class="lab"><font color="Green" title="E88">A30</font></span>: 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  <a href="xxreal_0.html#NR3" title="XXREAL_0:NR.3">&lt;</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p2">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> 
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E1:95_3_1"><span class="lab"><font color="Green" title="E78">A18</font></span></a>, <a class="ref" href="xxreal_0.html#T1" onmouseover="rs('xxreal_0/T1')" onmouseout="rh()">XXREAL_0:1</a></span>;<br/><a NAME="E16:95_3_1"/><span class="lab"><font color="Green" title="E89">A31</font></span>: 
1 <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <font color="Maroon" title="c10">j1</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E9:95_3_1"><span class="lab"><font color="Green" title="E83">A23</font></span></a>, <a class="ref" href="matrix_0.html#T32" onmouseover="rs('matrix_0/T32')" onmouseout="rh()">MATRIX_0:32</a></span>;<br/><a NAME="E17:95_3_1"/>
<font color="Maroon" title="c10">j1</font> <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a>  <a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E9:95_3_1"><span class="lab"><font color="Green" title="E83">A23</font></span></a>, <a class="ref" href="matrix_0.html#T32" onmouseover="rs('matrix_0/T32')" onmouseout="rh()">MATRIX_0:32</a></span>;<br/><a NAME="E18:95_3_1"/><span class="kw">then </span>
<font color="Maroon" title="c8">i1</font> <a href="xxreal_0.html#NR4" title="XXREAL_0:NR.4">&gt;</a> <font color="Maroon" title="c10">j1</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E6:95_3_1"><span class="lab"><font color="Green" title="E81">A21</font></span></a>, <a class="txt" href="#E7:95_3_1"><span class="lab"><font color="Green" title="E82">A22</font></span></a>, <a class="txt" href="#E13:95_3_1"><span class="lab"><font color="Green" title="E87">A27</font></span></a>, <a class="txt" href="#E10:95_3_1"><span class="lab"><font color="Green" title="E84">A24</font></span></a>, <a class="txt" href="#E11:95_3_1"><span class="lab"><font color="Green" title="E85">A25</font></span></a>, <a class="txt" href="#E15:95_3_1"><span class="lab"><font color="Green" title="E88">A30</font></span></a>, <a class="ref" href="jordan1a.html#T18" target="_self" onmouseover="rs('jordan1a/T18')" onmouseout="rh()">Th18</a></span>;<br/><a NAME="E19:95_3_1"/><span class="kw">then </span>
 <a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="xxreal_0.html#NR4" title="XXREAL_0:NR.4">&gt;</a> <font color="Maroon" title="c10">j1</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E12:95_3_1"><span class="lab"><font color="Green" title="E86">A26</font></span></a>, <a class="ref" href="xxreal_0.html#T2" onmouseover="rs('xxreal_0/T2')" onmouseout="rh()">XXREAL_0:2</a></span>;<br/><a NAME="E20:95_3_1"/><span class="kw">then </span><span class="lab"><font color="Green" title="E90">A32</font></span>: 
<span class="p1">(<span class="default"><a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p2">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span></span>)</span> <a href="nat_d.html#K7" title="NAT_D:func.7">-'</a> 1 <a href="xxreal_0.html#NR2" title="XXREAL_0:NR.2">&gt;=</a> <font color="Maroon" title="c10">j1</font>
 <span class="kw">by</span> <span class="lab"><a class="ref" href="nat_d.html#T49" onmouseover="rs('nat_d/T49')" onmouseout="rh()">NAT_D:49</a></span>;<br/><font color="Maroon" title="c5">x</font> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  = 
<span class="p1">(<span class="default"><a href="pscomp_1.html#K23" title="PSCOMP_1:func.23">E-min</a> <font color="Maroon" title="c3">C</font></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E1:95"><span class="lab"><font color="Green" title="E61">A1</font></span></a>, <a class="ref" href="pscomp_1.html#T47" onmouseover="rs('pscomp_1/T47')" onmouseout="rh()">PSCOMP_1:47</a></span>
<br/>.= 
 <a href="pscomp_1.html#K8" title="PSCOMP_1:func.8">E-bound</a> <font color="Maroon" title="c3">C</font>
<span class="kw">by</span> <span class="lab"><a class="ref" href="euclid.html#T52" onmouseover="rs('euclid/T52')" onmouseout="rh()">EUCLID:52</a></span>
<br/>.= 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="matrix_0.html#K3" title="MATRIX_0:func.3">*</a> (<span class="p2">(<span class="default"><span class="p3">(<span class="default"><a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p4">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span></span>)</span> <a href="nat_d.html#K7" title="NAT_D:func.7">-'</a> 1</span>)</span>,<font color="Maroon" title="c9">i2</font>)</span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E19:95"><span class="lab"><font color="Green" title="E75">A15</font></span></a>, <a class="txt" href="#E7:95_3_1"><span class="lab"><font color="Green" title="E82">A22</font></span></a>, <a class="ref" href="jordan8.html#T12" onmouseover="rs('jordan8/T12')" onmouseout="rh()">JORDAN8:12</a></span>
;<br/><a NAME="E22:95_3_1"/><span class="kw">then </span>
<font color="Maroon" title="c5">x</font> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  <a href="xxreal_0.html#NR2" title="XXREAL_0:NR.2">&gt;=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> 
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E19:95"><span class="lab"><font color="Green" title="E75">A15</font></span></a>, <a class="txt" href="#E20:95"><span class="lab"><font color="Green" title="E76">A16</font></span></a>, <a class="txt" href="#E7:95_3_1"><span class="lab"><font color="Green" title="E82">A22</font></span></a>, <a class="txt" href="#E10:95_3_1"><span class="lab"><font color="Green" title="E84">A24</font></span></a>, <a class="txt" href="#E11:95_3_1"><span class="lab"><font color="Green" title="E85">A25</font></span></a>, <a class="txt" href="#E16:95_3_1"><span class="lab"><font color="Green" title="E89">A31</font></span></a>, <a class="txt" href="#E20:95_3_1"><span class="lab"><font color="Green" title="E90">A32</font></span></a>, <a class="ref" href="jordan1a.html#T18" target="_self" onmouseover="rs('jordan1a/T18')" onmouseout="rh()">Th18</a></span>;<br/><a NAME="E23:95_3_1"/><span class="kw">then </span>
<font color="Maroon" title="c5">x</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="topreal1.html#K3" title="TOPREAL1:func.3">L~</a> <span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E8:95"><span class="lab"><font color="Green" title="E68">A8</font></span></a>, <a class="txt" href="#E18:95"><span class="lab"><font color="Green" title="E74">A14</font></span></a>, <a class="txt" href="#E17:95"><span class="lab"><font color="Green" title="E73">A13</font></span></a>, <a class="txt" href="#E3:95_3_1"><span class="lab"><font color="Green" title="E79">A19</font></span></a>, <a class="ref" href="goboard7.html#T8" onmouseover="rs('goboard7/T8')" onmouseout="rh()">GOBOARD7:8</a>, <a class="ref" href="sppol_2.html#T17" onmouseover="rs('sppol_2/T17')" onmouseout="rh()">SPPOL_2:17</a></span>;<br/><a NAME="E24:95_3_1"/><span class="kw">then </span>
<font color="Maroon" title="c5">x</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a> <span class="p1">(<span class="default"><a href="topreal1.html#K3" title="TOPREAL1:func.3">L~</a> <span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span></span>)</span> <a href="subset_1.html#K9" title="SUBSET_1:func.9">/\</a> <font color="Maroon" title="c3">C</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E21:95"><span class="lab"><font color="Green" title="E77">A17</font></span></a>, <a class="ref" href="xboole_0.html#D4" onmouseover="rs('xboole_0/D4')" onmouseout="rh()">XBOOLE_0:def 4</a></span>;<br/><a NAME="E25:95_3_1"/><span class="kw">then </span>
 <a href="topreal1.html#K3" title="TOPREAL1:func.3">L~</a> <span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="subset_1.html#R2" title="SUBSET_1:pred.2">meets</a> <font color="Maroon" title="c3">C</font>
 ;<br/><span class="kw">hence </span><a NAME="E26:95_3_1"/>
contradiction
 <span class="kw">by</span> <span class="lab"><a class="ref" href="jordan10.html#T5" onmouseover="rs('jordan10/T5')" onmouseout="rh()">JORDAN10:5</a></span>; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> verum</span><br/></div><span class="kw">end;</span></div><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="95_3_2"><span class="kw">suppose </span></a><a NAME="E1:95_3_2"/><span class="lab"><font color="Green" title="E78">A33</font></span>: 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  <a href="xxreal_0.html#NR2" title="XXREAL_0:NR.2">&gt;=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p2">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> 
 ; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> contradiction</span><br/><div class="add"><a NAME="E2:95_3_2"/><span class="kw">then </span>
<font color="Maroon" title="c4">p</font> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> 
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:95"><span class="lab"><font color="Green" title="E65">A5</font></span></a>, <a class="txt" href="#E8:95"><span class="lab"><font color="Green" title="E68">A8</font></span></a>, <a class="ref" href="topreal1.html#T3" onmouseover="rs('topreal1/T3')" onmouseout="rh()">TOPREAL1:3</a></span>;<br/><a NAME="E3:95_3_2"/><span class="kw">then </span><span class="lab"><font color="Green" title="E79">A34</font></span>: 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  <a href="xxreal_0.html#NR4" title="XXREAL_0:NR.4">&gt;</a> <font color="Maroon" title="c5">x</font> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> 
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E21:95"><span class="lab"><font color="Green" title="E77">A17</font></span></a>, <a class="txt" href="#E15:95"><span class="lab"><font color="Green" title="E71">A11</font></span></a>, <a class="ref" href="jordan1a.html#T75" target="_self" onmouseover="rs('jordan1a/T75')" onmouseout="rh()">Th75</a>, <a class="ref" href="xxreal_0.html#T2" onmouseover="rs('xxreal_0/T2')" onmouseout="rh()">XXREAL_0:2</a></span>;<br/><span class="kw">consider </span><font color="Maroon" title="c8">i1</font>, <font color="Maroon" title="c9">i2</font> being   <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a><span class="kw"> such that </span><br/><a NAME="E5:95_3_2"/><span class="lab"><font color="Green" title="E80">A35</font></span>: 
<span class="p1"><a href="tarski.html#K4" title="TARSKI:func.4">[</a><span class="default"><font color="Maroon" title="c8">i1</font>,<font color="Maroon" title="c9">i2</font></span><a href="tarski.html#K4" title="TARSKI:func.4">]</a></span> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="matrix_0.html#K2" title="MATRIX_0:func.2">Indices</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>
 <span class="kw">and </span><br/><a NAME="E6:95_3_2"/><span class="lab"><font color="Green" title="E81">A36</font></span>: 
<span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="matrix_0.html#K3" title="MATRIX_0:func.3">*</a> (<font color="Maroon" title="c8">i1</font>,<font color="Maroon" title="c9">i2</font>)
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E16:95"><span class="lab"><font color="Green" title="E72">A12</font></span></a>, <a class="txt" href="#E13:95"><span class="lab"><font color="Green" title="E70">A10</font></span></a>, <a class="ref" href="goboard1.html#D9" onmouseover="rs('goboard1/D9')" onmouseout="rh()">GOBOARD1:def 9</a></span>;<br/><a NAME="E7:95_3_2"/><span class="lab"><font color="Green" title="E82">A37</font></span>: 
( 1 <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <font color="Maroon" title="c9">i2</font> &amp; <font color="Maroon" title="c9">i2</font> <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a>  <a href="matrix_0.html#K1" title="MATRIX_0:func.1">width</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> )
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:95_3_2"><span class="lab"><font color="Green" title="E80">A35</font></span></a>, <a class="ref" href="matrix_0.html#T32" onmouseover="rs('matrix_0/T32')" onmouseout="rh()">MATRIX_0:32</a></span>;<br/><span class="kw">consider </span><font color="Maroon" title="c10">j1</font>, <font color="Maroon" title="c11">j2</font> being   <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a><span class="kw"> such that </span><br/><a NAME="E9:95_3_2"/><span class="lab"><font color="Green" title="E83">A38</font></span>: 
<span class="p1"><a href="tarski.html#K4" title="TARSKI:func.4">[</a><span class="default"><font color="Maroon" title="c10">j1</font>,<font color="Maroon" title="c11">j2</font></span><a href="tarski.html#K4" title="TARSKI:func.4">]</a></span> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="matrix_0.html#K2" title="MATRIX_0:func.2">Indices</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>
 <span class="kw">and </span><br/><a NAME="E10:95_3_2"/><span class="lab"><font color="Green" title="E84">A39</font></span>: 
<span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="matrix_0.html#K3" title="MATRIX_0:func.3">*</a> (<font color="Maroon" title="c10">j1</font>,<font color="Maroon" title="c11">j2</font>)
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E16:95"><span class="lab"><font color="Green" title="E72">A12</font></span></a>, <a class="txt" href="#E11:95"><span class="lab"><font color="Green" title="E69">A9</font></span></a>, <a class="ref" href="goboard1.html#D9" onmouseover="rs('goboard1/D9')" onmouseout="rh()">GOBOARD1:def 9</a></span>;<br/><a NAME="E11:95_3_2"/><span class="lab"><font color="Green" title="E85">A40</font></span>: 
( 1 <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <font color="Maroon" title="c11">j2</font> &amp; <font color="Maroon" title="c11">j2</font> <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a>  <a href="matrix_0.html#K1" title="MATRIX_0:func.1">width</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> )
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E9:95_3_2"><span class="lab"><font color="Green" title="E83">A38</font></span></a>, <a class="ref" href="matrix_0.html#T32" onmouseover="rs('matrix_0/T32')" onmouseout="rh()">MATRIX_0:32</a></span>;<br/><a NAME="E12:95_3_2"/><span class="lab"><font color="Green" title="E86">A41</font></span>: 
<font color="Maroon" title="c8">i1</font> <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a>  <a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:95_3_2"><span class="lab"><font color="Green" title="E80">A35</font></span></a>, <a class="ref" href="matrix_0.html#T32" onmouseover="rs('matrix_0/T32')" onmouseout="rh()">MATRIX_0:32</a></span>;<br/><a NAME="E13:95_3_2"/><span class="lab"><font color="Green" title="E87">A42</font></span>: 
1 <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <font color="Maroon" title="c8">i1</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:95_3_2"><span class="lab"><font color="Green" title="E80">A35</font></span></a>, <a class="ref" href="matrix_0.html#T32" onmouseover="rs('matrix_0/T32')" onmouseout="rh()">MATRIX_0:32</a></span>;<br/><div><a class="txt" onmouseover="tooltip.show('hs2',this)" onmouseout="tooltip.hide()" onclick="hs2(this)" href="javascript:()" title="95_3_2_1"><span class="kw">now </span> <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide">  not <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p2">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> </span></a><div class="add"><span class="kw">assume </span><a NAME="E1:95_3_2_1"/>
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p2">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> 
 ; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> contradiction</span><br/><a NAME="E2:95_3_2_1"/><span class="kw">then </span><span class="lab"><font color="Green" title="E88">A43</font></span>: 
<span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E18:95"><span class="lab"><font color="Green" title="E74">A14</font></span></a>, <a class="txt" href="#E17:95"><span class="lab"><font color="Green" title="E73">A13</font></span></a>, <a class="ref" href="topreal3.html#T6" onmouseover="rs('topreal3/T6')" onmouseout="rh()">TOPREAL3:6</a></span>;<br/><a NAME="E3:95_3_2_1"/><span class="kw">then </span><span class="lab"><font color="Green" title="E89">A44</font></span>: 
<font color="Maroon" title="c9">i2</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c11">j2</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:95_3_2"><span class="lab"><font color="Green" title="E80">A35</font></span></a>, <a class="txt" href="#E6:95_3_2"><span class="lab"><font color="Green" title="E81">A36</font></span></a>, <a class="txt" href="#E9:95_3_2"><span class="lab"><font color="Green" title="E83">A38</font></span></a>, <a class="txt" href="#E10:95_3_2"><span class="lab"><font color="Green" title="E84">A39</font></span></a>, <a class="ref" href="goboard1.html#T5" onmouseover="rs('goboard1/T5')" onmouseout="rh()">GOBOARD1:5</a></span>;<br/><a NAME="E4:95_3_2_1"/>
( <font color="Maroon" title="c8">i1</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c10">j1</font> &amp; <span class="p1"><a href="complex1.html#K9" title="COMPLEX1:func.9">|.</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c10">j1</font> <a href="xcmplx_0.html#K6" title="XCMPLX_0:func.6">-</a> <font color="Maroon" title="c8">i1</font></span>)</span></span><a href="complex1.html#K9" title="COMPLEX1:func.9">.|</a></span> <a href="xcmplx_0.html#K2" title="XCMPLX_0:func.2">+</a> <span class="p1"><a href="complex1.html#K9" title="COMPLEX1:func.9">|.</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c11">j2</font> <a href="xcmplx_0.html#K6" title="XCMPLX_0:func.6">-</a> <font color="Maroon" title="c9">i2</font></span>)</span></span><a href="complex1.html#K9" title="COMPLEX1:func.9">.|</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> 1 )
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E16:95"><span class="lab"><font color="Green" title="E72">A12</font></span></a>, <a class="txt" href="#E13:95"><span class="lab"><font color="Green" title="E70">A10</font></span></a>, <a class="txt" href="#E11:95"><span class="lab"><font color="Green" title="E69">A9</font></span></a>, <a class="txt" href="#E5:95_3_2"><span class="lab"><font color="Green" title="E80">A35</font></span></a>, <a class="txt" href="#E6:95_3_2"><span class="lab"><font color="Green" title="E81">A36</font></span></a>, <a class="txt" href="#E9:95_3_2"><span class="lab"><font color="Green" title="E83">A38</font></span></a>, <a class="txt" href="#E10:95_3_2"><span class="lab"><font color="Green" title="E84">A39</font></span></a>, <a class="txt" href="#E2:95_3_2_1"><span class="lab"><font color="Green" title="E88">A43</font></span></a>, <a class="ref" href="goboard1.html#T5" onmouseover="rs('goboard1/T5')" onmouseout="rh()">GOBOARD1:5</a>, <a class="ref" href="goboard1.html#D9" onmouseover="rs('goboard1/D9')" onmouseout="rh()">GOBOARD1:def 9</a></span>;<br/><span class="kw">then </span>1 = 
<a href="numbers.html#K5" title="NUMBERS:func.5">0</a> <a href="xcmplx_0.html#K2" title="XCMPLX_0:func.2">+</a> <span class="p1"><a href="complex1.html#K9" title="COMPLEX1:func.9">|.</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c9">i2</font> <a href="xcmplx_0.html#K6" title="XCMPLX_0:func.6">-</a> <font color="Maroon" title="c11">j2</font></span>)</span></span><a href="complex1.html#K9" title="COMPLEX1:func.9">.|</a></span>
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E3:95_3_2_1"><span class="lab"><font color="Green" title="E89">A44</font></span></a>, <a class="ref" href="goboard7.html#T2" onmouseover="rs('goboard7/T2')" onmouseout="rh()">GOBOARD7:2</a></span>
<br/>.= 
<a href="numbers.html#K5" title="NUMBERS:func.5">0</a> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> <a href="numbers.html#K5" title="NUMBERS:func.5">0</a>
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E3:95_3_2_1"><span class="lab"><font color="Green" title="E89">A44</font></span></a>, <a class="ref" href="goboard7.html#T2" onmouseover="rs('goboard7/T2')" onmouseout="rh()">GOBOARD7:2</a></span>
;<br/><span class="kw">hence </span><a NAME="E6:95_3_2_1"/>
contradiction
 ; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> verum</span><br/></div><span class="kw">end;</span></div><a NAME="E15:95_3_2"/><span class="kw">then </span><span class="lab"><font color="Green" title="E88">A45</font></span>: 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p2">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  <a href="xxreal_0.html#NR3" title="XXREAL_0:NR.3">&lt;</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <font color="Maroon" title="c1">i</font></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> 
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E1:95_3_2"><span class="lab"><font color="Green" title="E78">A33</font></span></a>, <a class="ref" href="xxreal_0.html#T1" onmouseover="rs('xxreal_0/T1')" onmouseout="rh()">XXREAL_0:1</a></span>;<br/><a NAME="E16:95_3_2"/><span class="lab"><font color="Green" title="E89">A46</font></span>: 
1 <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <font color="Maroon" title="c10">j1</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E9:95_3_2"><span class="lab"><font color="Green" title="E83">A38</font></span></a>, <a class="ref" href="matrix_0.html#T32" onmouseover="rs('matrix_0/T32')" onmouseout="rh()">MATRIX_0:32</a></span>;<br/><a NAME="E17:95_3_2"/>
<font color="Maroon" title="c10">j1</font> <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a>  <a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E9:95_3_2"><span class="lab"><font color="Green" title="E83">A38</font></span></a>, <a class="ref" href="matrix_0.html#T32" onmouseover="rs('matrix_0/T32')" onmouseout="rh()">MATRIX_0:32</a></span>;<br/><a NAME="E18:95_3_2"/><span class="kw">then </span>
<font color="Maroon" title="c8">i1</font> <a href="xxreal_0.html#NR4" title="XXREAL_0:NR.4">&gt;</a> <font color="Maroon" title="c10">j1</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E6:95_3_2"><span class="lab"><font color="Green" title="E81">A36</font></span></a>, <a class="txt" href="#E7:95_3_2"><span class="lab"><font color="Green" title="E82">A37</font></span></a>, <a class="txt" href="#E13:95_3_2"><span class="lab"><font color="Green" title="E87">A42</font></span></a>, <a class="txt" href="#E10:95_3_2"><span class="lab"><font color="Green" title="E84">A39</font></span></a>, <a class="txt" href="#E11:95_3_2"><span class="lab"><font color="Green" title="E85">A40</font></span></a>, <a class="txt" href="#E15:95_3_2"><span class="lab"><font color="Green" title="E88">A45</font></span></a>, <a class="ref" href="jordan1a.html#T18" target="_self" onmouseover="rs('jordan1a/T18')" onmouseout="rh()">Th18</a></span>;<br/><a NAME="E19:95_3_2"/><span class="kw">then </span>
 <a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p1">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="xxreal_0.html#NR4" title="XXREAL_0:NR.4">&gt;</a> <font color="Maroon" title="c10">j1</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E12:95_3_2"><span class="lab"><font color="Green" title="E86">A41</font></span></a>, <a class="ref" href="xxreal_0.html#T2" onmouseover="rs('xxreal_0/T2')" onmouseout="rh()">XXREAL_0:2</a></span>;<br/><a NAME="E20:95_3_2"/><span class="kw">then </span><span class="lab"><font color="Green" title="E90">A47</font></span>: 
<span class="p1">(<span class="default"><a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p2">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span></span>)</span> <a href="nat_d.html#K7" title="NAT_D:func.7">-'</a> 1 <a href="xxreal_0.html#NR2" title="XXREAL_0:NR.2">&gt;=</a> <font color="Maroon" title="c10">j1</font>
 <span class="kw">by</span> <span class="lab"><a class="ref" href="nat_d.html#T49" onmouseover="rs('nat_d/T49')" onmouseout="rh()">NAT_D:49</a></span>;<br/><font color="Maroon" title="c5">x</font> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  = 
<span class="p1">(<span class="default"><a href="pscomp_1.html#K23" title="PSCOMP_1:func.23">E-min</a> <font color="Maroon" title="c3">C</font></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E1:95"><span class="lab"><font color="Green" title="E61">A1</font></span></a>, <a class="ref" href="pscomp_1.html#T47" onmouseover="rs('pscomp_1/T47')" onmouseout="rh()">PSCOMP_1:47</a></span>
<br/>.= 
 <a href="pscomp_1.html#K8" title="PSCOMP_1:func.8">E-bound</a> <font color="Maroon" title="c3">C</font>
<span class="kw">by</span> <span class="lab"><a class="ref" href="euclid.html#T52" onmouseover="rs('euclid/T52')" onmouseout="rh()">EUCLID:52</a></span>
<br/>.= 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="matrix_0.html#K3" title="MATRIX_0:func.3">*</a> (<span class="p2">(<span class="default"><span class="p3">(<span class="default"><a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p4">(<span class="default"><a href="jordan8.html#K1" title="JORDAN8:func.1">Gauge</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span></span>)</span> <a href="nat_d.html#K7" title="NAT_D:func.7">-'</a> 1</span>)</span>,<font color="Maroon" title="c9">i2</font>)</span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E19:95"><span class="lab"><font color="Green" title="E75">A15</font></span></a>, <a class="txt" href="#E7:95_3_2"><span class="lab"><font color="Green" title="E82">A37</font></span></a>, <a class="ref" href="jordan8.html#T12" onmouseover="rs('jordan8/T12')" onmouseout="rh()">JORDAN8:12</a></span>
;<br/><a NAME="E22:95_3_2"/><span class="kw">then </span>
<font color="Maroon" title="c5">x</font> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a>  <a href="xxreal_0.html#NR2" title="XXREAL_0:NR.2">&gt;=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> <span class="p2">(<span class="default"><font color="Maroon" title="c1">i</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span></span>)</span> <a href="euclid.html#K17" title="EUCLID:func.17">`1</a> 
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E19:95"><span class="lab"><font color="Green" title="E75">A15</font></span></a>, <a class="txt" href="#E20:95"><span class="lab"><font color="Green" title="E76">A16</font></span></a>, <a class="txt" href="#E7:95_3_2"><span class="lab"><font color="Green" title="E82">A37</font></span></a>, <a class="txt" href="#E10:95_3_2"><span class="lab"><font color="Green" title="E84">A39</font></span></a>, <a class="txt" href="#E11:95_3_2"><span class="lab"><font color="Green" title="E85">A40</font></span></a>, <a class="txt" href="#E16:95_3_2"><span class="lab"><font color="Green" title="E89">A46</font></span></a>, <a class="txt" href="#E20:95_3_2"><span class="lab"><font color="Green" title="E90">A47</font></span></a>, <a class="ref" href="jordan1a.html#T18" target="_self" onmouseover="rs('jordan1a/T18')" onmouseout="rh()">Th18</a></span>;<br/><a NAME="E23:95_3_2"/><span class="kw">then </span>
<font color="Maroon" title="c5">x</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="topreal1.html#K3" title="TOPREAL1:func.3">L~</a> <span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E8:95"><span class="lab"><font color="Green" title="E68">A8</font></span></a>, <a class="txt" href="#E18:95"><span class="lab"><font color="Green" title="E74">A14</font></span></a>, <a class="txt" href="#E17:95"><span class="lab"><font color="Green" title="E73">A13</font></span></a>, <a class="txt" href="#E3:95_3_2"><span class="lab"><font color="Green" title="E79">A34</font></span></a>, <a class="ref" href="goboard7.html#T8" onmouseover="rs('goboard7/T8')" onmouseout="rh()">GOBOARD7:8</a>, <a class="ref" href="sppol_2.html#T17" onmouseover="rs('sppol_2/T17')" onmouseout="rh()">SPPOL_2:17</a></span>;<br/><a NAME="E24:95_3_2"/><span class="kw">then </span>
<font color="Maroon" title="c5">x</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a> <span class="p1">(<span class="default"><a href="topreal1.html#K3" title="TOPREAL1:func.3">L~</a> <span class="p2">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span></span>)</span> <a href="subset_1.html#K9" title="SUBSET_1:func.9">/\</a> <font color="Maroon" title="c3">C</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E21:95"><span class="lab"><font color="Green" title="E77">A17</font></span></a>, <a class="ref" href="xboole_0.html#D4" onmouseover="rs('xboole_0/D4')" onmouseout="rh()">XBOOLE_0:def 4</a></span>;<br/><a NAME="E25:95_3_2"/><span class="kw">then </span>
 <a href="topreal1.html#K3" title="TOPREAL1:func.3">L~</a> <span class="p1">(<span class="default"><a href="jordan9.html#K1" title="JORDAN9:func.1">Cage</a> (<font color="Maroon" title="c3">C</font>,<font color="Maroon" title="c2">n</font>)</span>)</span> <a href="subset_1.html#R2" title="SUBSET_1:pred.2">meets</a> <font color="Maroon" title="c3">C</font>
 ;<br/><span class="kw">hence </span><a NAME="E26:95_3_2"/>
contradiction
 <span class="kw">by</span> <span class="lab"><a class="ref" href="jordan10.html#T5" onmouseover="rs('jordan10/T5')" onmouseout="rh()">JORDAN10:5</a></span>; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> verum</span><br/></div><span class="kw">end;</span></div></div><span class="kw">end;</span></div>

</div>
