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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>let </b><font color="Maroon">y</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> <font color="Maroon">x</font>,<span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">y</font></span>)</span> = 
 <a href="robbins1.html#NK11" target="_self">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">x</font></span>)</span> <a href="robbins1.html#K5" target="_self">+</a> <span class="p2">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">y</font></span>)</span></span>)</span>

<br/>.= 
 <a href="robbins1.html#K9" target="_self">\delta</a> <font color="Maroon">y</font>,<span class="p1">(<span class="default"><a href="robbins1.html#NK11" target="_self">-</a> <font color="Maroon">x</font></span>)</span>

;<br/>


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