<?xml version="1.0"?>
<div class="add">

<span class="kw">set </span><font color="Maroon" title="c2">L</font> = <font color="Maroon" title="c1">B</font> <a href="latstone.html#K10" title="LATSTONE:func.10">squared-latt</a> ;<br/>
<a NAME="E1:83_1_1"/>
 for <font color="Olive" title="b1">x</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <span class="p1">(<span class="default"><font color="Maroon" title="c1">B</font> <a href="latstone.html#K10" title="LATSTONE:func.10">squared-latt</a></span>)</span>  ex <font color="Olive" title="b2">y</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <span class="p1">(<span class="default"><font color="Maroon" title="c1">B</font> <a href="latstone.html#K10" title="LATSTONE:func.10">squared-latt</a></span>)</span> st <font color="Olive" title="b2">y</font> <a href="latstone.html#R1" title="LATSTONE:pred.1">is_a_pseudocomplement_of</a> <font color="Olive" title="b1">x</font>
 
<div><a class="txt" onmouseover="tooltip.show('hs2',this)" onmouseout="tooltip.hide()" onclick="hs2(this)" href="javascript:()" title="83_1_1_1"><span class="kw">proof </span></a><div class="add">

<span class="kw">let </span><font color="Maroon" title="c3">x</font> be   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <span class="p1">(<span class="default"><font color="Maroon" title="c1">B</font> <a href="latstone.html#K10" title="LATSTONE:func.10">squared-latt</a></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">  ex <font color="Olive" title="b1">y</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <span class="p1">(<span class="default"><font color="Maroon" title="c1">B</font> <a href="latstone.html#K10" title="LATSTONE:func.10">squared-latt</a></span>)</span> st <font color="Olive" title="b1">y</font> <a href="latstone.html#R1" title="LATSTONE:pred.1">is_a_pseudocomplement_of</a> <font color="Maroon" title="c3">x</font></span><br/>

<a NAME="E1:83_1_1_1"/>
<font color="Maroon" title="c3">x</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <span class="p1">(<span class="default"><font color="Maroon" title="c1">B</font> <a href="latstone.html#K10" title="LATSTONE:func.10">squared-latt</a></span>)</span>
 
;<br/>
<a NAME="E2:83_1_1_1"/><span class="kw">then </span>
<font color="Maroon" title="c3">x</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a> <font color="Maroon" title="c1">B</font> <a href="latstone.html#K9" title="LATSTONE:func.9">squared</a> 
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="latstone.html#T34" target="_self" onmouseover="rs('latstone/T34')" onmouseout="rh()">SquaredCarrier</a></span>;<br/>
<span class="kw">then </span><span class="kw">consider </span><font color="Maroon" title="c4">x1</font>, <font color="Maroon" title="c5">x2</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c1">B</font><span class="kw"> such that </span><br/><a NAME="E4:83_1_1_1"/><span class="lab"><font color="Green" title="E33">A1</font></span>: 
( <font color="Maroon" title="c3">x</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><font color="Maroon" title="c4">x1</font>,<font color="Maroon" title="c5">x2</font></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span> &amp; <font color="Maroon" title="c4">x1</font> <a href="lattices.html#R3" title="LATTICES:pred.3">[=</a> <font color="Maroon" title="c5">x2</font> )
 ;<br/>
<a NAME="E5:83_1_1_1"/><span class="lab"><font color="Green" title="E34">I1</font></span>: 
<span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c5">x2</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a></span>)</span>,<span class="p2">(<span class="default"><font color="Maroon" title="c5">x2</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a></span>)</span></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a> <font color="Maroon" title="c1">B</font> <a href="latstone.html#K9" title="LATSTONE:func.9">squared</a> 
 
;<br/>
<span class="kw">reconsider </span><font color="Maroon" title="c6">y</font> = <span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c5">x2</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a></span>)</span>,<span class="p2">(<span class="default"><font color="Maroon" title="c5">x2</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a></span>)</span></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span> as   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <span class="p1">(<span class="default"><font color="Maroon" title="c1">B</font> <a href="latstone.html#K10" title="LATSTONE:func.10">squared-latt</a></span>)</span> <span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:83_1_1_1"><span class="lab"><font color="Green" title="E34">I1</font></span></a>, <a class="ref" href="latstone.html#T34" target="_self" onmouseover="rs('latstone/T34')" onmouseout="rh()">SquaredCarrier</a></span>;<br/>
<span class="kw">take </span>
<font color="Maroon" title="c6">y</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"> <font color="Maroon" title="c6">y</font> <a href="latstone.html#R1" title="LATSTONE:pred.1">is_a_pseudocomplement_of</a> <font color="Maroon" title="c3">x</font></span><br/>

<span class="lab"><font color="Green" title="E35">Z1</font></span>: <font color="Maroon" title="c3">x</font> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <font color="Maroon" title="c6">y</font> = 
<span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><font color="Maroon" title="c4">x1</font>,<font color="Maroon" title="c5">x2</font></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c5">x2</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a></span>)</span>,<span class="p2">(<span class="default"><font color="Maroon" title="c5">x2</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a></span>)</span></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span>
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E4:83_1_1_1"><span class="lab"><font color="Green" title="E33">A1</font></span></a>, <a class="ref" href="msualg_7.html#T11" onmouseover="rs('msualg_7/T11')" onmouseout="rh()">MSUALG_7:11</a></span>
<br/>.= 
<span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c4">x1</font> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <span class="p3">(<span class="default"><font color="Maroon" title="c5">x2</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a></span>)</span></span>)</span>,<span class="p2">(<span class="default"><font color="Maroon" title="c5">x2</font> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <span class="p3">(<span class="default"><font color="Maroon" title="c5">x2</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a></span>)</span></span>)</span></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span>
<span class="kw">by</span> <span class="lab"><a class="ref" href="filter_1.html#T35" onmouseover="rs('filter_1/T35')" onmouseout="rh()">FILTER_1:35</a></span>
<br/>.= 
<span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c4">x1</font> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <span class="p3">(<span class="default"><font color="Maroon" title="c5">x2</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a></span>)</span></span>)</span>,<span class="p2">(<span class="default"><a href="lattices.html#K5" title="LATTICES:func.5">Bottom</a> <font color="Maroon" title="c1">B</font></span>)</span></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span>
<span class="kw">by</span> <span class="lab"><a class="ref" href="lattices.html#T20" onmouseover="rs('lattices/T20')" onmouseout="rh()">LATTICES:20</a></span>
;<br/>
<a NAME="E8:83_1_1_1"/>
<font color="Maroon" title="c5">x2</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a>  <a href="lattices.html#R3" title="LATTICES:pred.3">[=</a> <font color="Maroon" title="c4">x1</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a> 
 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E4:83_1_1_1"><span class="lab"><font color="Green" title="E33">A1</font></span></a>, <a class="ref" href="lattices.html#T26" onmouseover="rs('lattices/T26')" onmouseout="rh()">LATTICES:26</a></span>;<br/>
<a NAME="E9:83_1_1_1"/><span class="kw">then </span>
<font color="Maroon" title="c4">x1</font> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <span class="p1">(<span class="default"><font color="Maroon" title="c5">x2</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a></span>)</span> <a href="lattices.html#R3" title="LATTICES:pred.3">[=</a> <font color="Maroon" title="c4">x1</font> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <span class="p1">(<span class="default"><font color="Maroon" title="c4">x1</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a></span>)</span>
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="filter_0.html#T5" onmouseover="rs('filter_0/T5')" onmouseout="rh()">FILTER_0:5</a></span>;<br/>
<a NAME="E10:83_1_1_1"/><span class="kw">then </span>
<font color="Maroon" title="c4">x1</font> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <span class="p1">(<span class="default"><font color="Maroon" title="c5">x2</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a></span>)</span> <a href="lattices.html#R3" title="LATTICES:pred.3">[=</a>  <a href="lattices.html#K5" title="LATTICES:func.5">Bottom</a> <font color="Maroon" title="c1">B</font>
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="lattices.html#T20" onmouseover="rs('lattices/T20')" onmouseout="rh()">LATTICES:20</a></span>;<br/>
<a NAME="E11:83_1_1_1"/><span class="kw">then </span><span class="lab"><font color="Green" title="E36">tt</font></span>: 
<font color="Maroon" title="c4">x1</font> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <span class="p1">(<span class="default"><font color="Maroon" title="c5">x2</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="lattices.html#K5" title="LATTICES:func.5">Bottom</a> <font color="Maroon" title="c1">B</font>
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="boolealg.html#T9" onmouseover="rs('boolealg/T9')" onmouseout="rh()">BOOLEALG:9</a></span>;<br/>
<a NAME="E12:83_1_1_1"/>
 for <font color="Olive" title="b1">w</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <span class="p1">(<span class="default"><font color="Maroon" title="c1">B</font> <a href="latstone.html#K10" title="LATSTONE:func.10">squared-latt</a></span>)</span>  st <font color="Maroon" title="c3">x</font> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <font color="Olive" title="b1">w</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="lattices.html#K5" title="LATTICES:func.5">Bottom</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">B</font> <a href="latstone.html#K10" title="LATSTONE:func.10">squared-latt</a></span>)</span> holds <br/><font color="Olive" title="b1">w</font> <a href="lattices.html#R3" title="LATTICES:pred.3">[=</a> <font color="Maroon" title="c6">y</font>
 
<div><a class="txt" onmouseover="tooltip.show('hs2',this)" onmouseout="tooltip.hide()" onclick="hs2(this)" href="javascript:()" title="83_1_1_1_2"><span class="kw">proof </span></a><div class="add">

<span class="kw">let </span><font color="Maroon" title="c7">w</font> be   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <span class="p1">(<span class="default"><font color="Maroon" title="c1">B</font> <a href="latstone.html#K10" title="LATSTONE:func.10">squared-latt</a></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="c3">x</font> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <font color="Maroon" title="c7">w</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="lattices.html#K5" title="LATTICES:func.5">Bottom</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">B</font> <a href="latstone.html#K10" title="LATSTONE:func.10">squared-latt</a></span>)</span> implies <font color="Maroon" title="c7">w</font> <a href="lattices.html#R3" title="LATTICES:pred.3">[=</a> <font color="Maroon" title="c6">y</font> )</span><br/>

<span class="kw">assume </span><a NAME="E1:83_1_1_1_2"/><span class="lab"><font color="Green" title="E37">O1</font></span>: 
<font color="Maroon" title="c3">x</font> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <font color="Maroon" title="c7">w</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="lattices.html#K5" title="LATTICES:func.5">Bottom</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">B</font> <a href="latstone.html#K10" title="LATSTONE:func.10">squared-latt</a></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="c7">w</font> <a href="lattices.html#R3" title="LATTICES:pred.3">[=</a> <font color="Maroon" title="c6">y</font></span><br/>

<a NAME="E2:83_1_1_1_2"/>
<font color="Maroon" title="c7">w</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <span class="p1">(<span class="default"><font color="Maroon" title="c1">B</font> <a href="latstone.html#K10" title="LATSTONE:func.10">squared-latt</a></span>)</span>
 
;<br/>
<a NAME="E3:83_1_1_1_2"/><span class="kw">then </span>
<font color="Maroon" title="c7">w</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a> <font color="Maroon" title="c1">B</font> <a href="latstone.html#K9" title="LATSTONE:func.9">squared</a> 
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="latstone.html#T34" target="_self" onmouseover="rs('latstone/T34')" onmouseout="rh()">SquaredCarrier</a></span>;<br/>
<span class="kw">then </span><span class="kw">consider </span><font color="Maroon" title="c8">w1</font>, <font color="Maroon" title="c9">w2</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c1">B</font><span class="kw"> such that </span><br/><a NAME="E5:83_1_1_1_2"/><span class="lab"><font color="Green" title="E38">Y1</font></span>: 
( <font color="Maroon" title="c7">w</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><font color="Maroon" title="c8">w1</font>,<font color="Maroon" title="c9">w2</font></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span> &amp; <font color="Maroon" title="c8">w1</font> <a href="lattices.html#R3" title="LATTICES:pred.3">[=</a> <font color="Maroon" title="c9">w2</font> )
 ;<br/>
<a NAME="E6:83_1_1_1_2"/>
<span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><font color="Maroon" title="c4">x1</font>,<font color="Maroon" title="c5">x2</font></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><font color="Maroon" title="c8">w1</font>,<font color="Maroon" title="c9">w2</font></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="lattices.html#K5" title="LATTICES:func.5">Bottom</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">B</font> <a href="latstone.html#K10" title="LATSTONE:func.10">squared-latt</a></span>)</span>
 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E1:83_1_1_1_2"><span class="lab"><font color="Green" title="E37">O1</font></span></a>, <a class="txt" href="#E5:83_1_1_1_2"><span class="lab"><font color="Green" title="E38">Y1</font></span></a>, <a class="txt" href="#E4:83_1_1_1"><span class="lab"><font color="Green" title="E33">A1</font></span></a>, <a class="ref" href="msualg_7.html#T11" onmouseover="rs('msualg_7/T11')" onmouseout="rh()">MSUALG_7:11</a></span>;<br/>
<a NAME="E7:83_1_1_1_2"/><span class="kw">then </span>
<span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><font color="Maroon" title="c4">x1</font>,<font color="Maroon" title="c5">x2</font></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><font color="Maroon" title="c8">w1</font>,<font color="Maroon" title="c9">w2</font></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><span class="p2">(<span class="default"><a href="lattices.html#K5" title="LATTICES:func.5">Bottom</a> <font color="Maroon" title="c1">B</font></span>)</span>,<span class="p2">(<span class="default"><a href="lattices.html#K5" title="LATTICES:func.5">Bottom</a> <font color="Maroon" title="c1">B</font></span>)</span></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span>
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="latstone.html#T37" target="_self" onmouseover="rs('latstone/T37')" onmouseout="rh()">SquaredBottom</a></span>;<br/>
<a NAME="E8:83_1_1_1_2"/><span class="kw">then </span>
<span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c4">x1</font> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <font color="Maroon" title="c8">w1</font></span>)</span>,<span class="p2">(<span class="default"><font color="Maroon" title="c5">x2</font> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <font color="Maroon" title="c9">w2</font></span>)</span></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><span class="p2">(<span class="default"><a href="lattices.html#K5" title="LATTICES:func.5">Bottom</a> <font color="Maroon" title="c1">B</font></span>)</span>,<span class="p2">(<span class="default"><a href="lattices.html#K5" title="LATTICES:func.5">Bottom</a> <font color="Maroon" title="c1">B</font></span>)</span></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span>
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="filter_1.html#T35" onmouseover="rs('filter_1/T35')" onmouseout="rh()">FILTER_1:35</a></span>;<br/>
<a NAME="E9:83_1_1_1_2"/><span class="kw">then </span>
( <font color="Maroon" title="c4">x1</font> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <font color="Maroon" title="c8">w1</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="lattices.html#K5" title="LATTICES:func.5">Bottom</a> <font color="Maroon" title="c1">B</font> &amp; <font color="Maroon" title="c5">x2</font> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <font color="Maroon" title="c9">w2</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="lattices.html#K5" title="LATTICES:func.5">Bottom</a> <font color="Maroon" title="c1">B</font> )
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="xtuple_0.html#T1" onmouseover="rs('xtuple_0/T1')" onmouseout="rh()">XTUPLE_0:1</a></span>;<br/>
<a NAME="E10:83_1_1_1_2"/><span class="kw">then </span><span class="lab"><font color="Green" title="E39">Y2</font></span>: 
<font color="Maroon" title="c9">w2</font> <a href="lattices.html#R3" title="LATTICES:pred.3">[=</a> <font color="Maroon" title="c5">x2</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a> 
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="lattices.html#T25" onmouseover="rs('lattices/T25')" onmouseout="rh()">LATTICES:25</a></span>;<br/>
<a NAME="E11:83_1_1_1_2"/><span class="kw">then </span>
<font color="Maroon" title="c8">w1</font> <a href="lattices.html#R3" title="LATTICES:pred.3">[=</a> <font color="Maroon" title="c5">x2</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a> 
 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:83_1_1_1_2"><span class="lab"><font color="Green" title="E38">Y1</font></span></a>, <a class="ref" href="lattices.html#T7" onmouseover="rs('lattices/T7')" onmouseout="rh()">LATTICES:7</a></span>;<br/>
<a NAME="E12:83_1_1_1_2"/><span class="kw">then </span>
<span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><font color="Maroon" title="c8">w1</font>,<font color="Maroon" title="c9">w2</font></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c5">x2</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a></span>)</span>,<span class="p2">(<span class="default"><font color="Maroon" title="c5">x2</font> <a href="lattices.html#K7" title="LATTICES:func.7">`</a></span>)</span></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="filter_1.html#K9" title="FILTER_1:func.9">[</a><span class="default"><font color="Maroon" title="c8">w1</font>,<font color="Maroon" title="c9">w2</font></span><a href="filter_1.html#K9" title="FILTER_1:func.9">]</a></span>
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="lattices.html#T4" onmouseover="rs('lattices/T4')" onmouseout="rh()">LATTICES:4</a>, <a class="txt" href="#E10:83_1_1_1_2"><span class="lab"><font color="Green" title="E39">Y2</font></span></a>, <a class="ref" href="filter_1.html#T36" onmouseover="rs('filter_1/T36')" onmouseout="rh()">FILTER_1:36</a></span>;<br/>
<a NAME="E13:83_1_1_1_2"/><span class="kw">then </span>
<font color="Maroon" title="c7">w</font> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <font color="Maroon" title="c6">y</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c7">w</font>
 
<span class="kw">by</span> <span class="lab"><a class="txt" href="#E5:83_1_1_1_2"><span class="lab"><font color="Green" title="E38">Y1</font></span></a>, <a class="ref" href="msualg_7.html#T11" onmouseover="rs('msualg_7/T11')" onmouseout="rh()">MSUALG_7:11</a></span>;<br/>
<span class="kw">hence </span><a NAME="E14:83_1_1_1_2"/>
<font color="Maroon" title="c7">w</font> <a href="lattices.html#R3" title="LATTICES:pred.3">[=</a> <font color="Maroon" title="c6">y</font>
 <span class="kw">by</span> <span class="lab"><a class="ref" href="lattices.html#T4" onmouseover="rs('lattices/T4')" onmouseout="rh()">LATTICES:4</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>
<span class="kw">hence </span><a NAME="E13:83_1_1_1"/>
<font color="Maroon" title="c6">y</font> <a href="latstone.html#R1" title="LATSTONE:pred.1">is_a_pseudocomplement_of</a> <font color="Maroon" title="c3">x</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E11:83_1_1_1"><span class="lab"><font color="Green" title="E36">tt</font></span></a>, <a class="txt" href="#E7:83_1_1_1"><span class="lab"><font color="Green" title="E35">Z1</font></span></a>, <a class="ref" href="latstone.html#T37" target="_self" onmouseover="rs('latstone/T37')" onmouseout="rh()">SquaredBottom</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>
<span class="kw">hence </span><a NAME="E2:83_1_1"/>
<font color="Maroon" title="c1">B</font> <a href="latstone.html#K10" title="LATSTONE:func.10">squared-latt</a>  is  <a href="latstone.html#V1" title="LATSTONE:attr.1">pseudocomplemented</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"> verum</span><br/>


</div>
