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<div><span class="kw">theorem </span><a NAME="T4"><span class="comment"><font color="firebrick">:: SRINGS_2:4</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">F</font> being   <a href="prob_1.html#NM3" title="PROB_1:NM.3">SigmaField</a> of <font color="Olive" title="b1">X</font> holds  <font color="Olive" title="b2">F</font> is   <a href="srings_1.html#NM1" title="SRINGS_1:NM.1">semiring_of_sets</a> of <font color="Olive" title="b1">X</font> ;<br/></div></div>
