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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E32">Th55</font></span>: <a NAME="T53"><span class="comment"><font color="firebrick">:: CLASSES5:53</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">U</font> being   <a href="classes2.html#NM1" title="CLASSES2:NM.1">Universe</a><br/>  for <font color="Olive" title="b2">o</font>, <font color="Olive" title="b3">m</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <font color="Olive" title="b1">U</font> holds   <a href="cat_1.html#K3" title="CAT_1:func.3">1Cat</a> (<font color="Olive" title="b2">o</font>,<font color="Olive" title="b3">m</font>) is <font color="Olive" title="b1">U</font> <a href="classes5.html#V7" title="CLASSES5:attr.7">-element</a> </div></div>
