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<span class="kw">thus </span><a NAME="E1:33_1_1"/>
 <a href="robbins1.html#K2" title="ROBBINS1:func.2">TrivOrtLat</a>  is  <a href="robbins3.html#V8" title="ROBBINS3:attr.8">involutive</a> 
  <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide">  <a href="robbins1.html#K2" title="ROBBINS1:func.2">TrivOrtLat</a>  is  <a href="robbins3.html#V9" title="ROBBINS3:attr.9">with_Top</a> </span><div><a class="txt" onclick="hs2(this)" href="javascript:()" title="33_1_1_1"><span class="kw">proof </span></a><div class="add">

<span class="kw">let </span><font color="Maroon" title="c1">x</font> be   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <a href="robbins1.html#K2" title="ROBBINS1:func.2">TrivOrtLat</a>; <span class="comment"><font color="firebrick">:: according to </font></span><a class="ref" href="robbins3.html#D6" target="_self" title="ROBBINS3:def.6">ROBBINS3:def 6</a> <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> <span class="p1">(<span class="default"><font color="Maroon" title="c1">x</font> <a href="robbins1.html#K3" title="ROBBINS1:func.3">`</a></span>)</span> <a href="robbins1.html#K3" title="ROBBINS1:func.3">`</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c1">x</font></span><br/>

<span class="kw">thus </span><a NAME="E1:33_1_1_1"/>
<span class="p1">(<span class="default"><font color="Maroon" title="c1">x</font> <a href="robbins1.html#K3" title="ROBBINS1:func.3">`</a></span>)</span> <a href="robbins1.html#K3" title="ROBBINS1:func.3">`</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c1">x</font>
 <span class="kw">by</span> <span class="lab"><a class="ref" href="struct_0.html#D10" title="STRUCT_0:def.10">STRUCT_0:def 10</a></span>; <a class="txt" 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">thus </span><a NAME="E2:33_1_1"/>
 <a href="robbins1.html#K2" title="ROBBINS1:func.2">TrivOrtLat</a>  is  <a href="robbins3.html#V9" title="ROBBINS3:attr.9">with_Top</a> 
  <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> verum</span><div><a class="txt" onclick="hs2(this)" href="javascript:()" title="33_1_1_2"><span class="kw">proof </span></a><div class="add">

<span class="kw">let </span><font color="Maroon" title="c1">x</font>, <font color="Maroon" title="c2">y</font> be   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <a href="robbins1.html#K2" title="ROBBINS1:func.2">TrivOrtLat</a>; <span class="comment"><font color="firebrick">:: according to </font></span><a class="ref" href="robbins3.html#D7" target="_self" title="ROBBINS3:def.7">ROBBINS3:def 7</a> <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> <font color="Maroon" title="c1">x</font> <a href="robbins3.html#NK1" title="ROBBINS3:NK.1">|_|</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">x</font> <a href="robbins1.html#K3" title="ROBBINS1:func.3">`</a></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c2">y</font> <a href="robbins3.html#NK1" title="ROBBINS3:NK.1">|_|</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">y</font> <a href="robbins1.html#K3" title="ROBBINS1:func.3">`</a></span>)</span></span><br/>

<span class="kw">thus </span><a NAME="E1:33_1_1_2"/>
<font color="Maroon" title="c1">x</font> <a href="robbins3.html#NK1" title="ROBBINS3:NK.1">|_|</a> <span class="p1">(<span class="default"><font color="Maroon" title="c1">x</font> <a href="robbins1.html#K3" title="ROBBINS1:func.3">`</a></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c2">y</font> <a href="robbins3.html#NK1" title="ROBBINS3:NK.1">|_|</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">y</font> <a href="robbins1.html#K3" title="ROBBINS1:func.3">`</a></span>)</span>
 <span class="kw">by</span> <span class="lab"><a class="ref" href="struct_0.html#D10" title="STRUCT_0:def.10">STRUCT_0:def 10</a></span>; <a class="txt" 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>


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