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<b>let </b><font color="Maroon">c<sub>1</sub></font> be  non <a href="xboole_0.html#V1">empty</a>  <a href="hidden.html#M1">set</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 <span class="p1">(<span class="default"><a href="lfuzzy_0.html#K4" target="_self">FuzzyLattice</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>;<br/>





<a NAME="E1:48"/>
( <font color="Maroon">c<sub>1</sub></font>,<span class="p1">(<span class="default"><a href="lfuzzy_0.html#K5" target="_self">@</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="lfuzzy_0.html#K6" target="_self">@</a>  <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>2</sub></font> &amp; <font color="Maroon">c<sub>1</sub></font>,<span class="p1">(<span class="default"><a href="lfuzzy_0.html#K5" target="_self">@</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="lfuzzy_0.html#K6" target="_self">@</a>  <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>3</sub></font> )
 
;<br/>
<b>hence </b><a NAME="E2:48"/>
( <font color="Maroon">c<sub>2</sub></font> <a href="lfuzzy_0.html#NR1" target="_self">&lt;&lt;=</a> <font color="Maroon">c<sub>3</sub></font> iff for <font color="Olive">b<sub>1</sub></font> being   <a href="subset_1.html#M1">Element</a> of <font color="Maroon">c<sub>1</sub></font> holds <span class="p1">(<span class="default"><a href="lfuzzy_0.html#K5" target="_self">@</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="lfuzzy_0.html#K7" target="_self">.</a> <font color="Olive">b<sub>1</sub></font> <a href="lfuzzy_0.html#NR5" target="_self">&lt;R=</a> <span class="p1">(<span class="default"><a href="lfuzzy_0.html#K5" target="_self">@</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="lfuzzy_0.html#K7" target="_self">.</a> <font color="Olive">b<sub>1</sub></font> )
 <b>by </b><i><a class="ref" href="lfuzzy_0.html#T16" target="_self">Th16</a></i>;<br/>


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