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<b>consider </b><font color="Maroon">c<sub>1</sub></font> being   <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>take </b><font color="Maroon">c<sub>2</sub></font> =  <a href="lattices.html#G1" target="_self">/\-SemiLattStr</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">c<sub>1</sub></font> #);<br/>

<a NAME="E2:18_2_1"/><i><font color="Green">E12</font></i>: 
for <font color="Olive">b<sub>1</sub></font>, <font color="Olive">b<sub>2</sub></font> being  <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>2</sub></font> holds <font color="Olive">b<sub>1</sub></font> <a href="lattices.html#K2" target="_self">"/\"</a> <font color="Olive">b<sub>2</sub></font> <a href="hidden.html#R1">=</a> <font color="Olive">b<sub>2</sub></font> <a href="lattices.html#K2" target="_self">"/\"</a> <font color="Olive">b<sub>1</sub></font>
 
<b>by </b><i><a class="txt" href="lattices.html#E6"><i><font color="Green">Lemma4</font></i></a></i>;<br/>
<a NAME="E3:18_2_1"/>
for <font color="Olive">b<sub>1</sub></font>, <font color="Olive">b<sub>2</sub></font>, <font color="Olive">b<sub>3</sub></font> being  <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>2</sub></font> holds <font color="Olive">b<sub>1</sub></font> <a href="lattices.html#K2" target="_self">"/\"</a> <span class="p1">(<span class="default"><font color="Olive">b<sub>2</sub></font> <a href="lattices.html#K2" target="_self">"/\"</a> <font color="Olive">b<sub>3</sub></font></span>)</span> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><font color="Olive">b<sub>1</sub></font> <a href="lattices.html#K2" target="_self">"/\"</a> <font color="Olive">b<sub>2</sub></font></span>)</span> <a href="lattices.html#K2" target="_self">"/\"</a> <font color="Olive">b<sub>3</sub></font>
 
<b>by </b><i><a class="txt" href="lattices.html#E6"><i><font color="Green">Lemma4</font></i></a></i>;<br/>
<b>hence </b><a NAME="E4:18_2_1"/>
( <font color="Maroon">c<sub>2</sub></font> is <a href="lattices.html#V1" target="_self">strict</a> &amp; <font color="Maroon">c<sub>2</sub></font> is <a href="lattices.html#V6" target="_self">meet-commutative</a> &amp; <font color="Maroon">c<sub>2</sub></font> is <a href="lattices.html#V7" target="_self">meet-associative</a> )
 <b>by </b><i><a class="ref" href="lattices.html#D6" target="_self">Def6</a>, <a class="ref" href="lattices.html#D7" target="_self">Def7</a>, <a class="txt" href="lattices.html#E2:18_2_1"><i><font color="Green">E12</font></i></a></i>;<br/>


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