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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">H</font> be    <a href="filter_0.html#M1" target="_self">Filter</a> of <font color="Maroon">L</font>;<br/>



<b>consider </b><font color="Maroon">x</font> being    <a href="subset_1.html#M2">Element</a> of <font color="Maroon">H</font>;<br/>
<a NAME="E2:11"/>
<font color="Maroon">x</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font>
 
;<br/>
<b>hence </b><a NAME="E3:11"/>
 ex <font color="Olive">p</font> being  <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font> st <font color="Olive">p</font> <a href="hidden.html#R2">in</a> <font color="Maroon">H</font>
 ;<br/>


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