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<b>let </b><font color="Maroon" title="c5">f</font> be    <a href="subset_1.html#M2" title="SUBSET_1:mode.2">Element</a> of <font color="Maroon" title="c4">S</font>;<br/>

<b>thus </b><a NAME="E1:81_1_1"/>
<font color="Maroon" title="c5">f</font> is    <a href="rfunct_3.html#M2" title="RFUNCT_3:mode.2">Element</a> of <font color="Maroon" title="c3">P</font>
 ;<br/>


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