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<div><span class="kw">theorem </span><a NAME="T51"><span class="comment"><font color="firebrick">:: MMLQUERY:51</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="mmlquery.html#V1" title="MMLQUERY:attr.1">filtering</a>  <a href="mmlquery.html#NM2" title="MMLQUERY:NM.2">Operation</a> of <font color="Olive" title="b1">X</font> holds  <font color="Olive" title="b2">F</font> <a href="mmlquery.html#K20" title="MMLQUERY:func.20">OR</a> <span class="p1">(<span class="default"><a href="mmlquery.html#K18" title="MMLQUERY:func.18">NOT</a> <font color="Olive" title="b2">F</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="relat_1.html#K4" title="RELAT_1:func.4">id</a> <font color="Olive" title="b1">X</font></div></div>
