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<b>let </b><font color="Maroon">h1</font> be    <a href="fuzzy_1.html#M1" target="_self">Membership_Func</a> of <font color="Maroon">C</font>, <font color="Maroon">h2</font> be    <a href="fuzzy_1.html#M1" target="_self">Membership_Func</a> of <font color="Maroon">C</font>;<br/>

<b>assume </b><a NAME="E1:11_1_3"/><i><font color="Green">E52</font></i>: 
for <font color="Olive">c</font> being   <a href="subset_1.html#M1">Element</a> of <font color="Maroon">C</font> holds  <font color="Maroon">h1</font> <a href="seq_1.html#K2">.</a> <font color="Olive">c</font> <a href="hidden.html#R1">=</a> 1 <a href="real_1.html#K5">-</a> <span class="p1">(<span class="default"><font color="Maroon">h2</font> <a href="seq_1.html#K2">.</a> <font color="Olive">c</font></span>)</span>
 ;<br/>

<b>let </b><font color="Maroon">c</font> be    <a href="subset_1.html#M1">Element</a> of <font color="Maroon">C</font>;<br/>

<b>thus </b><font color="Maroon">h2</font> <a href="seq_1.html#K2">.</a> <font color="Maroon">c</font> = 
1 <a href="real_1.html#K5">-</a> <span class="p1">(<span class="default">1 <a href="real_1.html#K5">-</a> <span class="p2">(<span class="default"><font color="Maroon">h2</font> <a href="seq_1.html#K2">.</a> <font color="Maroon">c</font></span>)</span></span>)</span>

<br/>.= 
1 <a href="real_1.html#K5">-</a> <span class="p1">(<span class="default"><font color="Maroon">h1</font> <a href="seq_1.html#K2">.</a> <font color="Maroon">c</font></span>)</span>
<b>by </b><i/>
;<br/>


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