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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E44">Th50</font></span>: <a NAME="T50"><span class="comment"><font color="firebrick">:: INT_4:50</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">m</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of  <a href="numbers.html#NK1" title="NUMBERS:NK.1">NAT</a>  holds <br/> (  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  <a href="int_4.html#R1" title="INT_4:pred.1">is_CRS_of</a> <font color="Olive" title="b1">m</font> iff <font color="Olive" title="b1">m</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="numbers.html#K5" title="NUMBERS:func.5">0</a>  )</div></div>
