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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="lattices.html#NM8">B_Lattice</a>;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font>, <font color="Maroon">c<sub>3</sub></font> be    <a href="filter_2.html#M2" target="_self">Ideal</a> of <font color="Maroon">c<sub>1</sub></font>;<br/>





<b>reconsider </b><font color="Maroon">c<sub>4</sub></font> = <font color="Maroon">c<sub>2</sub></font> <a href="filter_2.html#K15" target="_self">.:</a> , <font color="Maroon">c<sub>5</sub></font> = <font color="Maroon">c<sub>3</sub></font> <a href="filter_2.html#K15" target="_self">.:</a>  as    <a href="filter_2.html#M1" target="_self">Filter</a> of <font color="Maroon">c<sub>1</sub></font> <a href="lattice2.html#K1">.:</a>  ;<br/>
<b>thus </b><span class="p1"><a href="filter_2.html#K19" target="_self">(.</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="subset_1.html#K4">\/</a> <font color="Maroon">c<sub>3</sub></font></span>)</span></span><a href="filter_2.html#K19" target="_self">.&gt;</a></span> = 
<span class="p1"><a href="filter_2.html#K3" target="_self">&lt;.</a><span class="default"><span class="p2">(<span class="default"><span class="p3">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="subset_1.html#K4">\/</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="filter_2.html#K7" target="_self">.:</a> </span>)</span></span><a href="filter_2.html#K3" target="_self">.)</a></span>
<b>by </b><i><a class="ref" href="filter_2.html#T37" target="_self">Th37</a></i>
<br/>.= 
<span class="p1"><a href="filter_2.html#K3" target="_self">&lt;.</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon">c<sub>4</sub></font> <a href="subset_1.html#K4">\/</a> <font color="Maroon">c<sub>5</sub></font></span>)</span></span><a href="filter_2.html#K3" target="_self">.)</a></span>

<br/>.= 
<font color="Maroon">c<sub>4</sub></font> <a href="filter_2.html#K4" target="_self">"/\"</a> <font color="Maroon">c<sub>5</sub></font>
<b>by </b><i><a class="ref" href="filter_0.html#T52">FILTER_0:52</a></i>
<br/>.= 
<font color="Maroon">c<sub>2</sub></font> <a href="filter_2.html#K21" target="_self">"\/"</a> <font color="Maroon">c<sub>3</sub></font>
<b>by </b><i><a class="ref" href="filter_2.html#T45" target="_self">Th45</a></i>
;<br/>


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