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<b>let </b><font color="Maroon">G</font> be  non <a href="struct_0.html#V3">empty</a> <a href="lattices.html#V4">join-commutative</a> <a href="lattices.html#V5">join-associative</a> <a href="robbins1.html#V4" target="_self">Robbins</a>  <a href="robbins1.html#L2" target="_self">ComplLattStr</a> ;<br/><b>let </b><font color="Maroon">x</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">G</font>;<br/>



<b>thus </b> <a href="robbins1.html#K9" target="_self">\delta</a> <span class="p1">(<span class="default"><a href="robbins1.html#K12" target="_self">Double</a> <font color="Maroon">x</font></span>)</span>,<span class="p1">(<span class="default"><font color="Maroon">x</font> <a href="robbins1.html#K11" target="_self">_0</a> </span>)</span> = 
 <a href="robbins1.html#K10" target="_self">Expand</a> <font color="Maroon">x</font>,<font color="Maroon">x</font>

<br/>.= 
<font color="Maroon">x</font>
<b>by </b><i><a class="ref" href="robbins1.html#T10" target="_self">Th10</a></i>
;<br/>


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