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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">I</font> be    <a href="filter_2.html#M2" target="_self">Ideal</a> of <font color="Maroon">L</font>;<br/><b>let </b><font color="Maroon">J</font> be    <a href="filter_2.html#M2" target="_self">Ideal</a> of <font color="Maroon">L</font>;<br/>





<a NAME="E1:74"/>
( <font color="Maroon">I</font> <a href="filter_2.html#K20" target="_self">"\/"</a> <font color="Maroon">J</font> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><font color="Maroon">I</font> <a href="filter_2.html#K15" target="_self">.:</a> </span>)</span> <a href="filter_0.html#K5">"/\"</a> <span class="p1">(<span class="default"><font color="Maroon">J</font> <a href="filter_2.html#K15" target="_self">.:</a> </span>)</span> &amp; <font color="Maroon">I</font> <a href="filter_2.html#K15" target="_self">.:</a>  <a href="hidden.html#R1">=</a> <font color="Maroon">I</font> &amp; <font color="Maroon">J</font> <a href="filter_2.html#K15" target="_self">.:</a>  <a href="hidden.html#R1">=</a> <font color="Maroon">J</font> )
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E2:74"/>
( <font color="Maroon">I</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">I</font> <a href="filter_2.html#K20" target="_self">"\/"</a> <font color="Maroon">J</font> &amp; <font color="Maroon">J</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">I</font> <a href="filter_2.html#K20" target="_self">"\/"</a> <font color="Maroon">J</font> )
 <b>by </b><i><a class="ref" href="filter_0.html#T49">FILTER_0:49</a></i>;<br/>


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