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

<b>set </b><font color="Maroon" title="c1">O</font> =  <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a> ;<br/>
<b>set </b><font color="Maroon" title="c2">C</font> = the <a href="robbins1.html#U1" title="ROBBINS1:sel.1">Compl</a> of <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a> ;<br/>
<b>set </b><font color="Maroon" title="c3">S</font> = the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a> ;<br/>
<a NAME="E1:126"/><i><font color="Green" title="E67">A1</font></i>: 
the <a href="robbins1.html#U1" title="ROBBINS1:sel.1">Compl</a> of <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a>  <a href="oposet_1.html#R1" title="OPOSET_1:pred.1">QuasiOrthoComplement_on</a>  <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a> 
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="126_1"><b>proof </b></a><div class="add">

<a NAME="E1:126_1"/><i><font color="Green" title="E68">A2</font></i>: 
for <font color="Olive" title="b1">x</font> being   <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a>  holds  <span class="p1"><a href="tarski.html#K2" title="TARSKI:func.2">{</a><span class="default"><font color="Olive" title="b1">x</font>,<span class="p2">(<span class="default"><a href="vectsp_2.html#K7" title="VECTSP_2:func.7">op1</a>  <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Olive" title="b1">x</font></span>)</span></span><a href="tarski.html#K2" title="TARSKI:func.2">}</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="domain_1.html#K6" title="DOMAIN_1:func.6">{</a><span class="default"><font color="Olive" title="b1">x</font></span><a href="domain_1.html#K6" title="DOMAIN_1:func.6">}</a></span>
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="126_1_1"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon" title="c4">a</font> be    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a> ;<br/>

<a NAME="E1:126_1_1"/>
<font color="Maroon" title="c4">a</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <a href="vectsp_2.html#K7" title="VECTSP_2:func.7">op1</a>  <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c4">a</font>
 
<b>by </b><i><a class="txt" href="oposet_1.html#E4"><i><font color="Green" title="E2">Lm1</font></i></a>, <a class="ref" href="oposet_1.html#T3" target="_self" title="OPOSET_1:th.3">Th3</a>, <a class="ref" href="funct_1.html#T34" title="FUNCT_1:th.34">FUNCT_1:34</a></i>;<br/>
<b>hence </b><a NAME="E2:126_1_1"/>
<span class="p1"><a href="tarski.html#K2" title="TARSKI:func.2">{</a><span class="default"><font color="Maroon" title="c4">a</font>,<span class="p2">(<span class="default"><a href="vectsp_2.html#K7" title="VECTSP_2:func.7">op1</a>  <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c4">a</font></span>)</span></span><a href="tarski.html#K2" title="TARSKI:func.2">}</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="domain_1.html#K6" title="DOMAIN_1:func.6">{</a><span class="default"><font color="Maroon" title="c4">a</font></span><a href="domain_1.html#K6" title="DOMAIN_1:func.6">}</a></span>
 <b>by </b><i><a class="ref" href="enumset1.html#T69" title="ENUMSET1:th.69">ENUMSET1:69</a></i>;<br/>


</div><b>end;</b></div>
<b>reconsider </b><font color="Maroon" title="c4">f</font> = the <a href="robbins1.html#U1" title="ROBBINS1:sel.1">Compl</a> of <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a>  as   <a href="struct_0.html#NM6" title="STRUCT_0:NM.6">Function</a> of <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a> ,<a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a>  ;<br/>
<a NAME="E3:126_1"/>
for <font color="Olive" title="b1">x</font> being  <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a>  holds <br/> (  <a href="yellow_0.html#NK3" title="YELLOW_0:NK.3">sup</a> <span class="p1"><a href="domain_1.html#K7" title="DOMAIN_1:func.7">{</a><span class="default"><font color="Olive" title="b1">x</font>,<span class="p2">(<span class="default"><font color="Maroon" title="c4">f</font> <a href="funct_2.html#K3" title="FUNCT_2:func.3">.</a> <font color="Olive" title="b1">x</font></span>)</span></span><a href="domain_1.html#K7" title="DOMAIN_1:func.7">}</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Olive" title="b1">x</font> &amp;  <a href="yellow_0.html#NK4" title="YELLOW_0:NK.4">inf</a> <span class="p1"><a href="domain_1.html#K7" title="DOMAIN_1:func.7">{</a><span class="default"><font color="Olive" title="b1">x</font>,<span class="p2">(<span class="default"><font color="Maroon" title="c4">f</font> <a href="funct_2.html#K3" title="FUNCT_2:func.3">.</a> <font color="Olive" title="b1">x</font></span>)</span></span><a href="domain_1.html#K7" title="DOMAIN_1:func.7">}</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Olive" title="b1">x</font> &amp;  <a href="yellow_0.html#R1" title="YELLOW_0:pred.1">ex_sup_of</a> <span class="p1"><a href="domain_1.html#K7" title="DOMAIN_1:func.7">{</a><span class="default"><font color="Olive" title="b1">x</font>,<span class="p2">(<span class="default"><font color="Maroon" title="c4">f</font> <a href="funct_2.html#K3" title="FUNCT_2:func.3">.</a> <font color="Olive" title="b1">x</font></span>)</span></span><a href="domain_1.html#K7" title="DOMAIN_1:func.7">}</a></span>, <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a>  &amp;  <a href="yellow_0.html#R2" title="YELLOW_0:pred.2">ex_inf_of</a> <span class="p1"><a href="domain_1.html#K7" title="DOMAIN_1:func.7">{</a><span class="default"><font color="Olive" title="b1">x</font>,<span class="p2">(<span class="default"><font color="Maroon" title="c4">f</font> <a href="funct_2.html#K3" title="FUNCT_2:func.3">.</a> <font color="Olive" title="b1">x</font></span>)</span></span><a href="domain_1.html#K7" title="DOMAIN_1:func.7">}</a></span>, <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a>  )
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="126_1_2"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon" title="c5">a</font> be   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a> ;<br/>

<a NAME="E1:126_1_2"/>
<span class="p1"><a href="domain_1.html#K7" title="DOMAIN_1:func.7">{</a><span class="default"><font color="Maroon" title="c5">a</font>,<span class="p2">(<span class="default"><font color="Maroon" title="c4">f</font> <a href="funct_2.html#K3" title="FUNCT_2:func.3">.</a> <font color="Maroon" title="c5">a</font></span>)</span></span><a href="domain_1.html#K7" title="DOMAIN_1:func.7">}</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="domain_1.html#K6" title="DOMAIN_1:func.6">{</a><span class="default"><font color="Maroon" title="c5">a</font></span><a href="domain_1.html#K6" title="DOMAIN_1:func.6">}</a></span>
 
<b>by </b><i><a class="txt" href="oposet_1.html#E1:126_1"><i><font color="Green" title="E68">A2</font></i></a></i>;<br/>
<b>hence </b><a NAME="E2:126_1_2"/>
(  <a href="yellow_0.html#NK3" title="YELLOW_0:NK.3">sup</a> <span class="p1"><a href="domain_1.html#K7" title="DOMAIN_1:func.7">{</a><span class="default"><font color="Maroon" title="c5">a</font>,<span class="p2">(<span class="default"><font color="Maroon" title="c4">f</font> <a href="funct_2.html#K3" title="FUNCT_2:func.3">.</a> <font color="Maroon" title="c5">a</font></span>)</span></span><a href="domain_1.html#K7" title="DOMAIN_1:func.7">}</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c5">a</font> &amp;  <a href="yellow_0.html#NK4" title="YELLOW_0:NK.4">inf</a> <span class="p1"><a href="domain_1.html#K7" title="DOMAIN_1:func.7">{</a><span class="default"><font color="Maroon" title="c5">a</font>,<span class="p2">(<span class="default"><font color="Maroon" title="c4">f</font> <a href="funct_2.html#K3" title="FUNCT_2:func.3">.</a> <font color="Maroon" title="c5">a</font></span>)</span></span><a href="domain_1.html#K7" title="DOMAIN_1:func.7">}</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c5">a</font> &amp;  <a href="yellow_0.html#R1" title="YELLOW_0:pred.1">ex_sup_of</a> <span class="p1"><a href="domain_1.html#K7" title="DOMAIN_1:func.7">{</a><span class="default"><font color="Maroon" title="c5">a</font>,<span class="p2">(<span class="default"><font color="Maroon" title="c4">f</font> <a href="funct_2.html#K3" title="FUNCT_2:func.3">.</a> <font color="Maroon" title="c5">a</font></span>)</span></span><a href="domain_1.html#K7" title="DOMAIN_1:func.7">}</a></span>, <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a>  &amp;  <a href="yellow_0.html#R2" title="YELLOW_0:pred.2">ex_inf_of</a> <span class="p1"><a href="domain_1.html#K7" title="DOMAIN_1:func.7">{</a><span class="default"><font color="Maroon" title="c5">a</font>,<span class="p2">(<span class="default"><font color="Maroon" title="c4">f</font> <a href="funct_2.html#K3" title="FUNCT_2:func.3">.</a> <font color="Maroon" title="c5">a</font></span>)</span></span><a href="domain_1.html#K7" title="DOMAIN_1:func.7">}</a></span>, <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a>  )
 <b>by </b><i><a class="ref" href="yellow_0.html#T38" title="YELLOW_0:th.38">YELLOW_0:38</a>, <a class="ref" href="yellow_0.html#T39" title="YELLOW_0:th.39">YELLOW_0:39</a></i>;<br/>


</div><b>end;</b></div>
<b>hence </b><a NAME="E4:126_1"/>
the <a href="robbins1.html#U1" title="ROBBINS1:sel.1">Compl</a> of <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a>  <a href="oposet_1.html#R1" title="OPOSET_1:pred.1">QuasiOrthoComplement_on</a>  <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a> 
 <b>by </b><i><a class="ref" href="oposet_1.html#D34" target="_self" title="OPOSET_1:def.34">Def34</a>, <a class="ref" href="oposet_1.html#T51" target="_self" title="OPOSET_1:th.51">Th51</a></i>;<br/>


</div><b>end;</b></div>
<b>reconsider </b><font color="Maroon" title="c4">f</font> = the <a href="robbins1.html#U1" title="ROBBINS1:sel.1">Compl</a> of <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a>  as   <a href="struct_0.html#NM6" title="STRUCT_0:NM.6">Function</a> of <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a> ,<a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a>  ;<br/>
<b>thus </b><a NAME="E3:126"/>
 <a href="oposet_1.html#K3" title="OPOSET_1:func.3">TrivOrthoRelStr</a>  is <a href="oposet_1.html#V20" title="OPOSET_1:attr.20">QuasiOrthocomplemented</a>
 <b>by </b><i><a class="txt" href="oposet_1.html#E1:126"><i><font color="Green" title="E67">A1</font></i></a>, <a class="ref" href="oposet_1.html#D35" target="_self" title="OPOSET_1:def.35">Def35</a></i>;<br/>


</div>
