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<b>let </b><font color="Maroon">C</font> be  <a href="lattice3.html#V4" target="_self">complete</a> <a href="lattices.html#NM1">Lattice</a>;<br/><b>let </b><font color="Maroon">a</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">C</font>;<br/><b>let </b><font color="Maroon">X</font> be    <a href="hidden.html#M1">set</a> ;<br/>





<b>assume </b><a NAME="E1:76"/>
<font color="Maroon">a</font> <a href="lattice3.html#R3" target="_self">is_less_than</a> <font color="Maroon">X</font>
 ;<br/>

<a NAME="E2:76"/><b>then </b>
<font color="Maroon">a</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <font color="Olive">b</font> where <font color="Olive">b</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">C</font> : <font color="Olive">b</font> <a href="lattice3.html#R3" target="_self">is_less_than</a> <font color="Maroon">X</font> </span>}</span> 
 
;<br/>
<a NAME="E3:76"/><b>then </b>
<font color="Maroon">a</font> <a href="lattices.html#R3">[=</a>  <a href="lattice3.html#K15" target="_self">"\/"</a> <span class="p1">{<span class="default"> <font color="Olive">b</font> where <font color="Olive">b</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">C</font> : <font color="Olive">b</font> <a href="lattice3.html#R3" target="_self">is_less_than</a> <font color="Maroon">X</font> </span>}</span> ,<font color="Maroon">C</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E4:76"/>
<font color="Maroon">a</font> <a href="lattices.html#R3">[=</a>  <a href="lattice3.html#K16" target="_self">"/\"</a> <font color="Maroon">X</font>,<font color="Maroon">C</font>
 ;<br/>


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