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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E4">Th21</font></span>: <a NAME="T21"><span class="comment"><font color="firebrick">:: MSSUBFAM:21</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">I</font> being    <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a> <br/>  for <font color="Olive" title="b2">A</font> being   <a href="pboole.html#NM1" title="PBOOLE:NM.1">ManySortedSet</a> of <font color="Olive" title="b1">I</font> holds <br/> ( <font color="Olive" title="b2">A</font> is <a href="finset_1.html#V2" title="FINSET_1:attr.2">V39</a>() iff  <a href="mboolean.html#K1" title="MBOOLEAN:func.1">bool</a> <font color="Olive" title="b2">A</font> is <a href="finset_1.html#V2" title="FINSET_1:attr.2">V39</a>() )</div></div>
