<?xml version="1.0"?>
<div class="add">

<b>let </b><font color="Maroon">L</font> be   <a href="lattices.html#NM1">Lattice</a>;<br/><b>let </b><font color="Maroon">p</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font>;<br/><b>let </b><font color="Maroon">q</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font>;<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/>







<a NAME="E1:10"/>
( <font color="Maroon">p</font> <a href="lattices.html#R3">[=</a> <font color="Maroon">p</font> <a href="lattices.html#K3">"\/"</a> <font color="Maroon">q</font> &amp; <font color="Maroon">p</font> <a href="lattices.html#K3">"\/"</a> <font color="Maroon">q</font> <a href="hidden.html#R1">=</a> <font color="Maroon">q</font> <a href="lattices.html#K3">"\/"</a> <font color="Maroon">p</font> )
 
<b>by </b><i><a class="ref" href="lattices.html#T22">LATTICES:22</a></i>;<br/>
<b>hence </b><a NAME="E2:10"/>
( <font color="Maroon">p</font> <a href="hidden.html#R2">in</a> <font color="Maroon">H</font> implies ( <font color="Maroon">p</font> <a href="lattices.html#K3">"\/"</a> <font color="Maroon">q</font> <a href="hidden.html#R2">in</a> <font color="Maroon">H</font> &amp; <font color="Maroon">q</font> <a href="lattices.html#K3">"\/"</a> <font color="Maroon">p</font> <a href="hidden.html#R2">in</a> <font color="Maroon">H</font> ) )
 <b>by </b><i/>;<br/>


</div>
