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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E48">Th71</font></span>: <a NAME="T71"><span class="comment"><font color="firebrick">:: NUMPOLY1:71</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">x</font> being    <a href="ordinal1.html#NM2" title="ORDINAL1:NM.2">number</a>  holds <br/> ( <font color="Olive" title="b1">x</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="numpoly1.html#K9" title="NUMPOLY1:func.9">SquareNumbers</a>  iff <font color="Olive" title="b1">x</font> is  <a href="pythtrip.html#V1" title="PYTHTRIP:attr.1">square</a>  )</div></div>
