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<b>let </b><font color="Maroon">A</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">B</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">C</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">X</font> be   <a href="subset_1.html#NM2">Subset</a> of <font color="Maroon">A</font>;<br/><b>let </b><font color="Maroon">R</font> be    <a href="relset_1.html#M2">Relation</a> of <font color="Maroon">A</font>,<font color="Maroon">B</font>;<br/><b>let </b><font color="Maroon">S</font> be    <a href="relset_1.html#M2">Relation</a> of <font color="Maroon">B</font>,<font color="Maroon">C</font>;<br/>











<span class="p1">(<span class="default"><font color="Maroon">S</font> <a href="relset_2.html#K5" target="_self">.:^</a> <span class="p2">(<span class="default"><font color="Maroon">R</font> <a href="relset_1.html#K10">.:</a> <font color="Maroon">X</font></span>)</span></span>)</span> <a href="subset_1.html#K3">`</a>  = 
<span class="p1">(<span class="default"><font color="Maroon">S</font> <a href="subset_1.html#K3">`</a> </span>)</span> <a href="relat_1.html#K9">.:</a> <span class="p1">(<span class="default"><font color="Maroon">R</font> <a href="relset_1.html#K10">.:</a> <font color="Maroon">X</font></span>)</span>
<b>by </b><i/>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon">R</font> <a href="relset_2.html#K6" target="_self">*</a> <span class="p2">(<span class="default"><font color="Maroon">S</font> <a href="subset_1.html#K3">`</a> </span>)</span></span>)</span> <a href="relset_1.html#K10">.:</a> <font color="Maroon">X</font>
<b>by </b><i><a class="ref" href="relat_1.html#T159">RELAT_1:159</a></i>
;<br/>
<b>then </b><font color="Maroon">S</font> <a href="relset_2.html#K5" target="_self">.:^</a> <span class="p1">(<span class="default"><font color="Maroon">R</font> <a href="relset_1.html#K10">.:</a> <font color="Maroon">X</font></span>)</span> = 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">R</font> <a href="relset_2.html#K6" target="_self">*</a> <span class="p3">(<span class="default"><font color="Maroon">S</font> <a href="subset_1.html#K3">`</a> </span>)</span></span>)</span> <a href="relset_1.html#K10">.:</a> <font color="Maroon">X</font></span>)</span> <a href="subset_1.html#K3">`</a> 

<br/>.= 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">R</font> <a href="relset_2.html#K6" target="_self">*</a> <span class="p3">(<span class="default"><font color="Maroon">S</font> <a href="subset_1.html#K3">`</a> </span>)</span></span>)</span> <a href="subset_1.html#K3">`</a> </span>)</span> <a href="relset_2.html#K5" target="_self">.:^</a> <font color="Maroon">X</font>
<b>by </b><i><a class="ref" href="relset_2.html#T2" target="_self">Th2</a></i>
;<br/>
<b>hence </b><a NAME="E3:67"/>
<font color="Maroon">S</font> <a href="relset_2.html#K5" target="_self">.:^</a> <span class="p1">(<span class="default"><font color="Maroon">R</font> <a href="relset_1.html#K10">.:</a> <font color="Maroon">X</font></span>)</span> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">R</font> <a href="relset_2.html#K6" target="_self">*</a> <span class="p3">(<span class="default"><font color="Maroon">S</font> <a href="subset_1.html#K3">`</a> </span>)</span></span>)</span> <a href="subset_1.html#K3">`</a> </span>)</span> <a href="relset_2.html#K5" target="_self">.:^</a> <font color="Maroon">X</font>
 ;<br/>


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