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<b>let </b><font color="Maroon">S1</font> be  non <a href="struct_0.html#V3">empty</a>  <a href="msualg_1.html#L1">ManySortedSign</a> , <font color="Maroon">S2</font> be  non <a href="struct_0.html#V3">empty</a>  <a href="msualg_1.html#L1">ManySortedSign</a> ;<br/>

<b>set </b><font color="Maroon">R1</font> = the <a href="msualg_1.html#U3">ResultSort</a> of <font color="Maroon">S1</font>;<br/>
<b>set </b><font color="Maroon">R2</font> = the <a href="msualg_1.html#U3">ResultSort</a> of <font color="Maroon">S2</font>;<br/>
<a NAME="E1:53"/><i><font color="Green">E33</font></i>: 
 <a href="msafree2.html#K3">InnerVertices</a> <span class="p1">(<span class="default"><font color="Maroon">S1</font> <a href="circcomb.html#K3">+*</a> <font color="Maroon">S2</font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="relat_1.html#K2">rng</a> <span class="p1">(<span class="default">the <a href="msualg_1.html#U3">ResultSort</a> of <font color="Maroon">S1</font> <a href="funct_4.html#K1">+*</a> the <a href="msualg_1.html#U3">ResultSort</a> of <font color="Maroon">S2</font></span>)</span>
 
<b>by </b><i><a class="ref" href="circcomb.html#D2">CIRCCOMB:def 2</a></i>;<br/>
<a NAME="E2:53"/>
 <a href="msafree2.html#K3">InnerVertices</a> <font color="Maroon">S2</font> <a href="tarski.html#R1">c=</a>  <a href="msafree2.html#K3">InnerVertices</a> <span class="p1">(<span class="default"><font color="Maroon">S1</font> <a href="circcomb.html#K3">+*</a> <font color="Maroon">S2</font></span>)</span>
 
<b>by </b><i><a class="ref" href="facirc_1.html#D1" target="_self">Def1</a>, <a class="ref" href="funct_4.html#T19">FUNCT_4:19</a></i>;<br/>
<b>hence </b><a NAME="E3:53"/>
for <font color="Olive">x</font> being   <a href="hidden.html#M1">set</a>   st <font color="Olive">x</font> <a href="hidden.html#R2">in</a>  <a href="msafree2.html#K3">InnerVertices</a> <font color="Maroon">S2</font> holds <br/><font color="Olive">x</font> <a href="hidden.html#R2">in</a>  <a href="msafree2.html#K3">InnerVertices</a> <span class="p1">(<span class="default"><font color="Maroon">S1</font> <a href="circcomb.html#K3">+*</a> <font color="Maroon">S2</font></span>)</span>
 ;<br/>


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