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<div><span class="kw">theorem </span><a NAME="T73"><span class="comment"><font color="firebrick">:: PROB_3:73</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> <br/>  for <font color="Olive" title="b2">Z</font> being   <a href="prob_1.html#NM1" title="PROB_1:NM.1">Field_Subset</a> of <font color="Olive" title="b1">Omega</font> holds   <a href="prob_1.html#K9" title="PROB_1:func.9">sigma</a> <font color="Olive" title="b2">Z</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="prob_3.html#K10" title="PROB_3:func.10">monotoneclass</a> <font color="Olive" title="b2">Z</font></div></div>
