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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E10">Th20</font></span>: <a NAME="T20"><span class="comment"><font color="firebrick">:: FILTER_2:20</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">L</font> being   <a href="lattices.html#NM1" title="LATTICES:NM.1">Lattice</a><br/>  for <font color="Olive" title="b2">x</font> being    <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a>  holds <br/> ( <font color="Olive" title="b2">x</font> is   <a href="filter_2.html#NM1" title="FILTER_2:NM.1">Ideal</a> of <font color="Olive" title="b1">L</font> iff <font color="Olive" title="b2">x</font> is   <a href="filter_0.html#NM1" title="FILTER_0:NM.1">Filter</a> of <span class="p1">(<span class="default"><font color="Olive" title="b1">L</font> <a href="lattice2.html#K1" title="LATTICE2:func.1">.:</a></span>)</span> )</div></div>
