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<b>let </b><font color="Maroon">c<sub>1</sub></font> be  non <a href="struct_0.html#V3">empty</a> <a href="lattices.html#V8" target="_self">meet-absorbing</a> <a href="lattices.html#V9" target="_self">join-absorbing</a>  <a href="lattices.html#L3" target="_self">LattStr</a> ;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font>, <font color="Maroon">c<sub>3</sub></font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font>;<br/>



<a NAME="E1:48"/>
( <font color="Maroon">c<sub>2</sub></font> <a href="lattices.html#R1" target="_self">[=</a> <font color="Maroon">c<sub>3</sub></font> iff <font color="Maroon">c<sub>2</sub></font> <a href="lattices.html#K1" target="_self">"\/"</a> <font color="Maroon">c<sub>3</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>3</sub></font> )
 
<b>by </b><i><a class="ref" href="lattices.html#D3" target="_self">Def3</a></i>;<br/>
<b>hence </b><a NAME="E2:48"/>
( <font color="Maroon">c<sub>2</sub></font> <a href="lattices.html#R1" target="_self">[=</a> <font color="Maroon">c<sub>3</sub></font> iff <font color="Maroon">c<sub>2</sub></font> <a href="lattices.html#K2" target="_self">"/\"</a> <font color="Maroon">c<sub>3</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>2</sub></font> )
 <b>by </b><i><a class="ref" href="lattices.html#D8" target="_self">Def8</a>, <a class="ref" href="lattices.html#D9" target="_self">Def9</a></i>;<br/>


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