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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E21">Th20</font></span>: <a NAME="T20"><span class="comment"><font color="firebrick">:: ABCMIZ_1:20</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">X</font> being    <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>   st  <a href="classes1.html#K6" title="CLASSES1:func.6">the_rank_of</a> <font color="Olive" title="b1">X</font> is  <a href="finset_1.html#V1" title="FINSET_1:attr.1">finite</a>  holds <br/><font color="Olive" title="b1">X</font> is  <a href="finset_1.html#V1" title="FINSET_1:attr.1">finite</a> </div></div>
