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<a NAME="E1:159_1_1"/>
(  <a href="relat_1.html#K2">rng</a> <font color="Maroon">O</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">J</font> &amp;  <a href="relat_1.html#K1">dom</a> <font color="Maroon">O</font> <a href="hidden.html#R1">=</a> <font color="Maroon">I</font> &amp;  <a href="relat_1.html#K1">dom</a> <font color="Maroon">F</font> <a href="hidden.html#R1">=</a> <font color="Maroon">J</font> )
 
<b>by </b><i>, <a class="ref" href="funct_2.html#D1">FUNCT_2:def 1</a>, <a class="ref" href="relset_1.html#T12">RELSET_1:12</a></i>;<br/>
<b>hence </b><a NAME="E2:159_1_1"/>
 <a href="relat_1.html#K1">dom</a> <span class="p1">(<span class="default"><font color="Maroon">F</font> <a href="funct_1.html#NK3" target="_self">*</a> <font color="Maroon">O</font></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">I</font>
 <b>by </b><i><a class="ref" href="relat_1.html#T46">RELAT_1:46</a></i>; <i><font color="Red">:: according to </font></i><a class="ref" href="pboole.html#D3" target="_self">PBOOLE:def 3</a><br/>


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