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<b>let </b><font color="Maroon">B</font> be   <a href="lattices.html#NM8">B_Lattice</a>;<br/><b>let </b><font color="Maroon">FB</font> be    <a href="filter_0.html#M1" target="_self">Filter</a> of <font color="Maroon">B</font>;<br/><b>let </b><font color="Maroon">HB</font> be    <a href="filter_0.html#M1" target="_self">Filter</a> of <font color="Maroon">B</font>;<br/>





<a NAME="E1:56"/>
<font color="Maroon">FB</font> <a href="filter_0.html#K7" target="_self">"/\"</a> <font color="Maroon">HB</font> <a href="hidden.html#R1">=</a> <span class="p1"><a href="filter_0.html#K3" target="_self">&lt;.</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon">FB</font> <a href="filter_0.html#K7" target="_self">"/\"</a> <font color="Maroon">HB</font></span>)</span></span><a href="filter_0.html#K3" target="_self">.)</a></span>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E2:56"/>
<span class="p1"><a href="filter_0.html#K3" target="_self">&lt;.</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon">FB</font> <a href="subset_1.html#K4">\/</a> <font color="Maroon">HB</font></span>)</span></span><a href="filter_0.html#K3" target="_self">.)</a></span> <a href="hidden.html#R1">=</a> <font color="Maroon">FB</font> <a href="filter_0.html#K7" target="_self">"/\"</a> <font color="Maroon">HB</font>
 <b>by </b><i><a class="ref" href="filter_0.html#T6" target="_self">Th6</a></i>;<br/>


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