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<b>let </b><font color="Maroon">n</font> be   <a href="binop_1.html#NM2">BinOp</a> of  <a href="zfmisc_1.html#K1">bool</a> <a href="xboole_0.html#K1">{}</a> , <font color="Maroon">u</font> be   <a href="binop_1.html#NM2">BinOp</a> of  <a href="zfmisc_1.html#K1">bool</a> <a href="xboole_0.html#K1">{}</a> ;<br/>

<b>set </b><font color="Maroon">G</font> =  <a href="lattices.html#G3" target="_self">LattStr</a>(# <span class="p1">(<span class="default"><a href="zfmisc_1.html#K1">bool</a> <a href="xboole_0.html#K1">{}</a> </span>)</span>,<font color="Maroon">n</font>,<font color="Maroon">u</font> #);<br/>
<b>reconsider </b><font color="Maroon">G</font> =  <a href="lattices.html#G3" target="_self">LattStr</a>(# <span class="p1">(<span class="default"><a href="zfmisc_1.html#K1">bool</a> <a href="xboole_0.html#K1">{}</a> </span>)</span>,<font color="Maroon">n</font>,<font color="Maroon">u</font> #) as   <a href="lattices.html#NM1">Lattice</a> <b>by </b><i/>;<br/>
<b>reconsider </b><font color="Maroon">D</font> =  <a href="xboole_0.html#K1">{}</a>  as   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">G</font> <b>by </b><i><a class="ref" href="zfmisc_1.html#D1">ZFMISC_1:def 1</a></i>;<br/>
<a NAME="E3:30"/>
for <font color="Olive">x</font> being  <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">G</font> holds <br/> ( <font color="Maroon">D</font> <a href="lattices.html#K3" target="_self">"\/"</a> <font color="Olive">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">D</font> &amp; <font color="Olive">x</font> <a href="lattices.html#K3" target="_self">"\/"</a> <font color="Maroon">D</font> <a href="hidden.html#R1">=</a> <font color="Maroon">D</font> )
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E4:30"/>
 <a href="lattices.html#G3" target="_self">LattStr</a>(# <span class="p1">(<span class="default"><a href="zfmisc_1.html#K1">bool</a> <a href="xboole_0.html#K1">{}</a> </span>)</span>,<font color="Maroon">n</font>,<font color="Maroon">u</font> #) is   <a href="lattices.html#NM5">1_Lattice</a>
 <b>by </b><i><a class="txt" href="lattices.html#E4"><i><font color="Green">Lemma15</font></i></a></i>;<br/>


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