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<a NAME="E1:23_1_1"/>
<font color="Maroon" title="c3">R</font> <a href="relset_1.html#K10" title="RELSET_1:func.10">.:</a> <span class="p1"><a href="tarski.html#K1" title="TARSKI:func.1">{</a><span class="default"><font color="Maroon" title="c4">x</font></span><a href="tarski.html#K1" title="TARSKI:func.1">}</a></span> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a> <font color="Maroon" title="c2">Y</font>
 
;<br/>
<b>hence </b><a NAME="E2:23_1_1"/>
 <a href="eqrel_1.html#NK6" title="EQREL_1:NK.6">Class</a> <font color="Maroon" title="c3">R</font>,<font color="Maroon" title="c4">x</font> is   <a href="subset_1.html#NM2" title="SUBSET_1:NM.2">Subset</a> of <font color="Maroon" title="c2">Y</font>
 ;<br/>


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