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<b>set </b><font color="Maroon">c<sub>1</sub></font> =  <a href="robbins3.html#K3" target="_self">TrivCLRelStr</a> ;<br/>
<b>thus </b><a NAME="E1:36_1_1"/>
 <a href="robbins3.html#K3" target="_self">TrivCLRelStr</a>  is <a href="robbins3.html#V8" target="_self">involutive</a>
 <div><a class="txt" onclick="hs2(this)" href="javascript:()" title="36_1_1_1"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon">c<sub>2</sub></font> be   <a href="struct_0.html#NM1">Element</a> of <a href="robbins3.html#K3" target="_self">TrivCLRelStr</a> ; <i><font color="Red">:: according to </font></i><a class="ref" href="robbins3.html#D6" target="_self">ROBBINS3:def 6</a><br/>

<b>thus </b><a NAME="E1:36_1_1_1"/>
<span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K3">`</a> </span>)</span> <a href="robbins1.html#K3">`</a>  <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>2</sub></font>
 <b>by </b><i><a class="ref" href="realset2.html#D7">REALSET2:def 7</a></i>;<br/>


</div><b>end;</b></div>

<b>thus </b><a NAME="E2:36_1_1"/>
 <a href="robbins3.html#K3" target="_self">TrivCLRelStr</a>  is <a href="robbins3.html#V9" target="_self">with_Top</a>
 <div><a class="txt" onclick="hs2(this)" href="javascript:()" title="36_1_1_2"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon">c<sub>2</sub></font>, <font color="Maroon">c<sub>3</sub></font> be   <a href="struct_0.html#NM1">Element</a> of <a href="robbins3.html#K3" target="_self">TrivCLRelStr</a> ; <i><font color="Red">:: according to </font></i><a class="ref" href="robbins3.html#D7" target="_self">ROBBINS3:def 7</a><br/>

<b>thus </b><a NAME="E1:36_1_1_2"/>
<font color="Maroon">c<sub>2</sub></font> <a href="robbins3.html#NK1" target="_self">|_|</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="robbins1.html#K3">`</a> </span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>3</sub></font> <a href="robbins3.html#NK1" target="_self">|_|</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="robbins1.html#K3">`</a> </span>)</span>
 <b>by </b><i><a class="ref" href="realset2.html#D7">REALSET2:def 7</a></i>;<br/>


</div><b>end;</b></div>


</div>
