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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E42">Th57</font></span>: <a NAME="T57"><span class="comment"><font color="firebrick">:: PROB_3:57</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> <br/>  for <font color="Olive" title="b2">Si</font> being   <a href="prob_1.html#NM3" title="PROB_1:NM.3">SigmaField</a> of <font color="Olive" title="b1">X</font><br/>  for <font color="Olive" title="b3">FSi</font> being    <a href="prob_3.html#M1" title="PROB_3:mode.1">FinSequence</a> of <font color="Olive" title="b2">Si</font> holds   <a href="prob_3.html#K5" title="PROB_3:func.5">Union</a> <font color="Olive" title="b3">FSi</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a> <font color="Olive" title="b2">Si</font></div></div>
