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<b>let </b><font color="Maroon">U0</font> be  <a href="unialg_1.html#V3">strict</a> <a href="unialg_2.html#V2">with_const_op</a> <a href="unialg_1.html#NM2">Universal_Algebra</a>;<br/>

<b>set </b><font color="Maroon">L</font> =  <a href="unialg_2.html#K12">UnSubAlLattice</a> <font color="Maroon">U0</font>;<br/>
<b>set </b><font color="Maroon">C</font> =  <a href="unialg_2.html#K6">Constants</a> <font color="Maroon">U0</font>;<br/>
<b>reconsider </b><font color="Maroon">G</font> =  <a href="unialg_2.html#K7">GenUnivAlg</a> <span class="p1">(<span class="default"><a href="unialg_2.html#K6">Constants</a> <font color="Maroon">U0</font></span>)</span> as    <a href="unialg_3.html#M2" target="_self">Element</a> of  <a href="unialg_3.html#K1" target="_self">Sub</a> <font color="Maroon">U0</font> <b>by </b><i><a class="ref" href="unialg_2.html#D15">UNIALG_2:def 15</a></i>;<br/>
<b>reconsider </b><font color="Maroon">l1</font> = <font color="Maroon">G</font> as   <a href="struct_0.html#NM1">Element</a> of <span class="p1">(<span class="default"><a href="unialg_2.html#K12">UnSubAlLattice</a> <font color="Maroon">U0</font></span>)</span> ;<br/>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="28_1"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">l</font> be   <a href="struct_0.html#NM1">Element</a> of <span class="p1">(<span class="default"><a href="unialg_2.html#K12">UnSubAlLattice</a> <font color="Maroon">U0</font></span>)</span>;<br/><b>reconsider </b><font color="Maroon">u1</font> = <font color="Maroon">l</font> as    <a href="unialg_3.html#M2" target="_self">Element</a> of  <a href="unialg_3.html#K1" target="_self">Sub</a> <font color="Maroon">U0</font> ;<br/><b>reconsider </b><font color="Maroon">U2</font> = <font color="Maroon">u1</font> as  <a href="unialg_1.html#V3">strict</a>  <a href="unialg_2.html#M3">SubAlgebra</a> of <font color="Maroon">U0</font> <b>by </b><i><a class="ref" href="unialg_2.html#D15">UNIALG_2:def 15</a></i>;<br/><b>thus </b><font color="Maroon">l1</font> <a href="lattices.html#K4">"/\"</a> <font color="Maroon">l</font> = 
<span class="p1">(<span class="default"><a href="unialg_2.html#K7">GenUnivAlg</a> <span class="p2">(<span class="default"><a href="unialg_2.html#K6">Constants</a> <font color="Maroon">U0</font></span>)</span></span>)</span> <a href="unialg_2.html#K5">/\</a> <font color="Maroon">U2</font>
<b>by </b><i><a class="ref" href="unialg_2.html#D17">UNIALG_2:def 17</a></i>
<br/>.= 
<font color="Maroon">l1</font>
<b>by </b><i/>
;<br/><b>hence </b><a NAME="E4:28_1"/>
<font color="Maroon">l</font> <a href="lattices.html#K4">"/\"</a> <font color="Maroon">l1</font> <a href="hidden.html#R1">=</a> <font color="Maroon">l1</font>
 ;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E4:28"/>
 <a href="lattices.html#K5">Bottom</a> <span class="p1">(<span class="default"><a href="unialg_2.html#K12">UnSubAlLattice</a> <font color="Maroon">U0</font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="unialg_2.html#K7">GenUnivAlg</a> <span class="p1">(<span class="default"><a href="unialg_2.html#K6">Constants</a> <font color="Maroon">U0</font></span>)</span>
 <b>by </b><i><a class="ref" href="lattices.html#D16">LATTICES:def 16</a></i>;<br/>


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