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<div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="6_1_1_1"><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="E1:6_1_1_1"/>
( <font color="Maroon" title="c1">C</font> is  <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</a>  or  not <font color="Maroon" title="c1">C</font> is  <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</a>  )
 </span>;<br/><div class="add"><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="6_1_1_1_1"><span class="kw">suppose </span></a><a NAME="E1:6_1_1_1_1"/>
<font color="Maroon" title="c1">C</font> is  <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</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">  <a href="cat_6.html#K8" title="CAT_6:func.8">id-</a> <font color="Maroon" title="c2">a</font> is  <a href="cat_6.html#V11" title="CAT_6:attr.11">identity</a> </span><br/><div class="add"><span class="kw">hence </span><a NAME="E2:6_1_1_1_1"/>
 <a href="cat_6.html#K8" title="CAT_6:func.8">id-</a> <font color="Maroon" title="c2">a</font> is  <a href="cat_6.html#V11" title="CAT_6:attr.11">identity</a> 
 <span class="kw">by</span> <span class="lab"><a class="ref" href="cat_6.html#T10" onmouseover="rs('cat_6/T10')" onmouseout="rh()">CAT_6:10</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="6_1_1_1_2"><span class="kw">suppose </span></a><a NAME="E1:6_1_1_1_2"/><span class="lab"><font color="Green" title="E1">A1</font></span>: 
 not <font color="Maroon" title="c1">C</font> is  <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</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">  <a href="cat_6.html#K8" title="CAT_6:func.8">id-</a> <font color="Maroon" title="c2">a</font> is  <a href="cat_6.html#V11" title="CAT_6:attr.11">identity</a> </span><br/><div class="add"><a NAME="E2:6_1_1_1_2"/>
 <a href="cat_6.html#K8" title="CAT_6:func.8">id-</a> <font color="Maroon" title="c2">a</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c2">a</font>
 <span class="kw">by</span> <span class="lab"><a class="ref" href="cat_6.html#D20" onmouseover="rs('cat_6/D20')" onmouseout="rh()">CAT_6:def 20</a></span>;<br/><span class="kw">hence </span><a NAME="E3:6_1_1_1_2"/>
 <a href="cat_6.html#K8" title="CAT_6:func.8">id-</a> <font color="Maroon" title="c2">a</font> is  <a href="cat_6.html#V11" title="CAT_6:attr.11">identity</a> 
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E1:6_1_1_1_2"><span class="lab"><font color="Green" title="E1">A1</font></span></a>, <a class="ref" href="cat_6.html#T22" onmouseover="rs('cat_6/T22')" onmouseout="rh()">CAT_6:22</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>

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