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<div><span class="kw">theorem </span><a NAME="T71"><span class="comment"><font color="firebrick">:: PROB_3:71</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">Omega</font> being   non  <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>   <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>  holds   <a href="setfam_1.html#K9" title="SETFAM_1:func.9">bool</a> <font color="Olive" title="b1">Omega</font> is   <a href="prob_3.html#NM2" title="PROB_3:NM.2">MonotoneClass</a> of <font color="Olive" title="b1">Omega</font> <span class="kw">by</span> <span class="lab"><a class="ref" href="prob_3.html#T68" target="_self" onmouseover="rs('prob_3/T68')" onmouseout="rh()">Th68</a></span>;<br/></div></div>
