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<b>let </b><font color="Maroon">f</font> be   <a href="relat_1.html#NM1">Relation</a>, <font color="Maroon">g</font> be   <a href="relat_1.html#NM1">Relation</a>;<br/><b>let </b><font color="Maroon">A</font> be    <a href="hidden.html#M1">set</a> , <font color="Maroon">B</font> be    <a href="hidden.html#M1">set</a> ;<br/>



<b>assume </b><a NAME="E1:176"/>
( <font color="Maroon">f</font> <a href="relat_1.html#K7" target="_self">|</a> <font color="Maroon">A</font> <a href="hidden.html#R1">=</a> <font color="Maroon">g</font> <a href="relat_1.html#K7" target="_self">|</a> <font color="Maroon">A</font> &amp; <font color="Maroon">f</font> <a href="relat_1.html#K7" target="_self">|</a> <font color="Maroon">B</font> <a href="hidden.html#R1">=</a> <font color="Maroon">g</font> <a href="relat_1.html#K7" target="_self">|</a> <font color="Maroon">B</font> )
 ;<br/>

<b>hence </b><font color="Maroon">f</font> <a href="relat_1.html#K7" target="_self">|</a> <span class="p1">(<span class="default"><font color="Maroon">A</font> <a href="xboole_0.html#K2">\/</a> <font color="Maroon">B</font></span>)</span> = 
<span class="p1">(<span class="default"><font color="Maroon">g</font> <a href="relat_1.html#K7" target="_self">|</a> <font color="Maroon">A</font></span>)</span> <a href="xboole_0.html#K2">\/</a> <span class="p1">(<span class="default"><font color="Maroon">g</font> <a href="relat_1.html#K7" target="_self">|</a> <font color="Maroon">B</font></span>)</span>
<b>by </b><i><a class="ref" href="relat_1.html#T14" target="_self">Th14</a></i>
<br/>.= 
<font color="Maroon">g</font> <a href="relat_1.html#K7" target="_self">|</a> <span class="p1">(<span class="default"><font color="Maroon">A</font> <a href="xboole_0.html#K2">\/</a> <font color="Maroon">B</font></span>)</span>
<b>by </b><i><a class="ref" href="relat_1.html#T14" target="_self">Th14</a></i>
;<br/><br/>


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