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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E15">Th16</font></span>: <a NAME="T16"><span class="comment"><font color="firebrick">:: PROB_1:16</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">X</font>, <font color="Olive" title="b2">Y</font> being    <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>   st <font color="Olive" title="b2">Y</font> is   <a href="prob_1.html#NM3" title="PROB_1:NM.3">SigmaField</a> of <font color="Olive" title="b1">X</font> holds <br/><font color="Olive" title="b2">Y</font> is   <a href="prob_1.html#NM1" title="PROB_1:NM.1">Field_Subset</a> of <font color="Olive" title="b1">X</font></div></div>
