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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E31">Th50</font></span>: <a NAME="T50"><span class="comment"><font color="firebrick">:: CARD_3:50</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">f</font> being   <a href="funct_1.html#NM1" title="FUNCT_1:NM.1">Function</a> holds   <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="card_3.html#K8" title="CARD_3:func.8">sproduct</a> <font color="Olive" title="b1">f</font></div></div>
