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<b>let </b><font color="Maroon" title="c1">L</font> be   <a href="lattices.html#NM1" title="LATTICES:NM.1">Lattice</a>; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> for <font color="Olive" title="b1">X</font>, <font color="Olive" title="b2">Y</font> being  <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c1">L</font>  st <font color="Olive" title="b1">X</font> <a href="boolealg.html#R2" title="BOOLEALG:pred.2">meets</a> <font color="Olive" title="b2">Y</font> holds <br/><font color="Olive" title="b2">Y</font> <a href="boolealg.html#R2" title="BOOLEALG:pred.2">meets</a> <font color="Olive" title="b1">X</font></span><br/><b>let </b><font color="Maroon" title="c2">X</font>, <font color="Maroon" title="c3">Y</font> be   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Maroon" title="c1">L</font>; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> ( <font color="Maroon" title="c2">X</font> <a href="boolealg.html#R2" title="BOOLEALG:pred.2">meets</a> <font color="Maroon" title="c3">Y</font> implies <font color="Maroon" title="c3">Y</font> <a href="boolealg.html#R2" title="BOOLEALG:pred.2">meets</a> <font color="Maroon" title="c2">X</font> )</span><br/>





<b>assume </b><a NAME="E1:11"/>
<font color="Maroon" title="c2">X</font> <a href="boolealg.html#R2" title="BOOLEALG:pred.2">meets</a> <font color="Maroon" title="c3">Y</font>
 ; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> <font color="Maroon" title="c3">Y</font> <a href="boolealg.html#R2" title="BOOLEALG:pred.2">meets</a> <font color="Maroon" title="c2">X</font></span><br/>

<a NAME="E2:11"/><b>then </b>
<font color="Maroon" title="c2">X</font> <a href="lattices.html#K4" title="LATTICES:func.4">"/\"</a> <font color="Maroon" title="c3">Y</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="lattices.html#K5" title="LATTICES:func.5">Bottom</a> <font color="Maroon" title="c1">L</font>
 
<b>by </b><i><a class="ref" href="boolealg.html#D4" target="_self" title="BOOLEALG:def.4">Def4</a></i>;<br/>
<b>hence </b><a NAME="E3:11"/>
<font color="Maroon" title="c3">Y</font> <a href="boolealg.html#R2" title="BOOLEALG:pred.2">meets</a> <font color="Maroon" title="c2">X</font>
 <b>by </b><i><a class="ref" href="boolealg.html#D4" target="_self" title="BOOLEALG:def.4">Def4</a></i>; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> verum</span><br/>


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