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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="lattices.html#NM4">0_Lattice</a>;<br/>

<a NAME="E1:65"/>
 <a href="lattices.html#K5">Bottom</a> <font color="Maroon">c<sub>1</sub></font> <a href="binop_1.html#R3">is_a_unity_wrt</a> the <a href="lattices.html#U2">L_join</a> of <font color="Maroon">c<sub>1</sub></font>
 
<b>by </b><i><a class="ref" href="lattice2.html#T66" target="_self">Th66</a></i>;<br/>
<b>hence </b><a NAME="E2:65"/>
the <a href="lattices.html#U2">L_join</a> of <font color="Maroon">c<sub>1</sub></font> <a href="setwiseo.html#NR1" target="_self">has_a_unity</a> 
 <b>by </b><i><a class="ref" href="setwiseo.html#D2">SETWISEO:def 2</a></i>;<br/>


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