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<span class="kw">let </span><font color="Maroon" title="c4">a</font>, <font color="Maroon" title="c5">b</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:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> ( <font color="Maroon" title="c4">a</font> <a href="yellow_5.html#R1" title="YELLOW_5:pred.1">meets</a> <font color="Maroon" title="c5">b</font> implies <font color="Maroon" title="c5">b</font> <a href="yellow_5.html#R1" title="YELLOW_5:pred.1">meets</a> <font color="Maroon" title="c4">a</font> )</span><br/>

<a NAME="E1:19_1_1"/>
( <font color="Maroon" title="c4">a</font> <a href="lattice3.html#K12" title="LATTICE3:func.12">"/\"</a> <font color="Maroon" title="c5">b</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="yellow_0.html#K3" title="YELLOW_0:func.3">Bottom</a> <font color="Maroon" title="c1">L</font> implies <font color="Maroon" title="c5">b</font> <a href="lattice3.html#K12" title="LATTICE3:func.12">"/\"</a> <font color="Maroon" title="c4">a</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="yellow_0.html#K3" title="YELLOW_0:func.3">Bottom</a> <font color="Maroon" title="c1">L</font> )
 
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<span class="kw">hence </span><a NAME="E2:19_1_1"/>
( <font color="Maroon" title="c4">a</font> <a href="yellow_5.html#R1" title="YELLOW_5:pred.1">meets</a> <font color="Maroon" title="c5">b</font> implies <font color="Maroon" title="c5">b</font> <a href="yellow_5.html#R1" title="YELLOW_5:pred.1">meets</a> <font color="Maroon" title="c4">a</font> )
 <span class="kw">by</span> <span class="lab"><a class="ref" href="yellow_5.html#D3" target="_self" title="YELLOW_5:def.3">Def3</a></span>; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> verum</span><br/>


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