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<b>let </b><font color="Maroon">BL</font> be  non <a href="realset2.html#V3">trivial</a> <a href="lattices.html#NM8">B_Lattice</a>;<br/>

<a NAME="E1:46"/>
 <a href="lopclset.html#K13" target="_self">UFilter</a> <font color="Maroon">BL</font> is <a href="lattice4.html#V3">isomorphism</a>
 
<b>by </b><i><a class="ref" href="lopclset.html#T7" target="_self">Th7</a></i>;<br/>
<b>then consider </b><font color="Maroon">f</font> being    <a href="lattice4.html#M1">Homomorphism</a> of <font color="Maroon">BL</font>, <a href="lopclset.html#K12" target="_self">StoneBLattice</a> <font color="Maroon">BL</font><b> such that </b><br/><a NAME="E3:46"/><i><font color="Green">E25</font></i>: 
( <font color="Maroon">f</font> <a href="funct_2.html#R2">=</a>  <a href="lopclset.html#K13" target="_self">UFilter</a> <font color="Maroon">BL</font> &amp; <font color="Maroon">f</font> is <a href="lattice4.html#V3">isomorphism</a> )
 ;<br/>
<b>thus </b><a NAME="E4:46"/>
<font color="Maroon">BL</font>, <a href="lopclset.html#K12" target="_self">StoneBLattice</a> <font color="Maroon">BL</font> <a href="filter_1.html#R1">are_isomorphic</a> 
 <b>by </b><i><a class="ref" href="lopclset.html#T9" target="_self">Th9</a>, <a class="ref" href="lattice4.html#D5">LATTICE4:def 5</a></i>;<br/>


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