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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">I</font> be   <a href="filter_0.html#NM2">I_Lattice</a>;<br/><b>let </b><font color="Maroon">i</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">I</font>;<br/><b>let </b><font color="Maroon">FI</font> be    <a href="filter_0.html#M1" target="_self">Filter</a> of <font color="Maroon">I</font>;<br/><b>let </b><font color="Maroon">a</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">B</font>;<br/>











<a NAME="E1:94"/>
<font color="Maroon">B</font> is   <a href="filter_0.html#NM2">I_Lattice</a>
 
<b>by </b><i/>;<br/>
<a NAME="E2:94"/><b>then </b>
( <font color="Maroon">i</font> <a href="filter_0.html#K4" target="_self">=&gt;</a> <font color="Maroon">i</font> <a href="hidden.html#R1">=</a>  <a href="lattices.html#K6">Top</a> <font color="Maroon">I</font> &amp; <font color="Maroon">a</font> <a href="filter_0.html#K4" target="_self">=&gt;</a> <font color="Maroon">a</font> <a href="hidden.html#R1">=</a>  <a href="lattices.html#K6">Top</a> <font color="Maroon">B</font> )
 
<b>by </b><i><a class="ref" href="filter_0.html#T4" target="_self">Th4</a></i>;<br/>
<a NAME="E3:94"/><b>then </b><i><font color="Green">E28</font></i>: 
( <font color="Maroon">i</font> <a href="filter_0.html#K9" target="_self">&lt;=&gt;</a> <font color="Maroon">i</font> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><a href="lattices.html#K6">Top</a> <font color="Maroon">I</font></span>)</span> <a href="lattices.html#K4">"/\"</a> <span class="p1">(<span class="default"><a href="lattices.html#K6">Top</a> <font color="Maroon">I</font></span>)</span> &amp; <font color="Maroon">a</font> <a href="filter_0.html#K9" target="_self">&lt;=&gt;</a> <font color="Maroon">a</font> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><a href="lattices.html#K6">Top</a> <font color="Maroon">B</font></span>)</span> <a href="lattices.html#K4">"/\"</a> <span class="p1">(<span class="default"><a href="lattices.html#K6">Top</a> <font color="Maroon">B</font></span>)</span> &amp; <span class="p1">(<span class="default"><a href="lattices.html#K6">Top</a> <font color="Maroon">I</font></span>)</span> <a href="lattices.html#K4">"/\"</a> <span class="p1">(<span class="default"><a href="lattices.html#K6">Top</a> <font color="Maroon">I</font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="lattices.html#K6">Top</a> <font color="Maroon">I</font> &amp; <span class="p1">(<span class="default"><a href="lattices.html#K6">Top</a> <font color="Maroon">B</font></span>)</span> <a href="lattices.html#K4">"/\"</a> <span class="p1">(<span class="default"><a href="lattices.html#K6">Top</a> <font color="Maroon">B</font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="lattices.html#K6">Top</a> <font color="Maroon">B</font> )
 
<b>by </b><i><a class="ref" href="lattices.html#T18">LATTICES:18</a></i>;<br/>
<a NAME="E4:94"/>
( <font color="Maroon">I</font> is   <a href="lattices.html#NM5">1_Lattice</a> &amp; <font color="Maroon">B</font> is   <a href="lattices.html#NM5">1_Lattice</a> )
 
<b>by </b><i><a class="txt" href="filter_0.html#E3:94"><i><font color="Green">E28</font></i></a></i>;<br/>
<b>hence </b><a NAME="E5:94"/>
( <font color="Maroon">i</font> <a href="filter_0.html#K9" target="_self">&lt;=&gt;</a> <font color="Maroon">i</font> <a href="hidden.html#R2">in</a> <font color="Maroon">FI</font> &amp; <font color="Maroon">a</font> <a href="filter_0.html#K9" target="_self">&lt;=&gt;</a> <font color="Maroon">a</font> <a href="hidden.html#R2">in</a> <font color="Maroon">FB</font> )
 <b>by </b><i>, </i>; <i><font color="Red">:: according to </font></i><a class="ref" href="filter_0.html#D13" target="_self">FILTER_0:def 13</a><br/>


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