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<b>let </b><font color="Maroon">L</font> be   <a href="lattices.html#NM1">Lattice</a>;<br/><b>let </b><font color="Maroon">F</font> be    <a href="filter_0.html#M1" target="_self">Filter</a> of <font color="Maroon">L</font>;<br/>



<a NAME="E1:27"/>
for <font color="Olive">H</font> being   <a href="filter_0.html#M1" target="_self">Filter</a> of <font color="Maroon">L</font>  st <font color="Maroon">F</font> <a href="tarski.html#R1">c=</a> <font color="Olive">H</font> holds <br/><font color="Maroon">F</font> <a href="tarski.html#R1">c=</a> <font color="Olive">H</font>
 
;<br/>
<b>hence </b><a NAME="E2:27"/>
<span class="p1"><a href="filter_0.html#K3" target="_self">&lt;.</a><span class="default"><font color="Maroon">F</font></span><a href="filter_0.html#K3" target="_self">.)</a></span> <a href="hidden.html#R1">=</a> <font color="Maroon">F</font>
 <b>by </b><i/>;<br/>


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