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<b>let </b><font color="Maroon">N</font> be   <a href="card_1.html#NM1">Cardinal</a>;<br/><b>let </b><font color="Maroon">M</font> be   <a href="card_1.html#NM1">Cardinal</a>;<br/>



<b>set </b><font color="Maroon">F</font> = <font color="Maroon">N</font> <a href="funcop_1.html#K2">--&gt;</a> <font color="Maroon">M</font>;<br/>
<a NAME="E1:49"/>
(  <a href="card_2.html#K3">exp</a> <font color="Maroon">M</font>,<font color="Maroon">N</font> <a href="hidden.html#R1">=</a>  <a href="card_1.html#K1">Card</a> <span class="p1">(<span class="default"><a href="funct_2.html#K1">Funcs</a> <font color="Maroon">N</font>,<font color="Maroon">M</font></span>)</span> &amp;  <a href="card_3.html#K7" target="_self">Product</a> <span class="p1">(<span class="default"><font color="Maroon">N</font> <a href="funcop_1.html#K2">--&gt;</a> <font color="Maroon">M</font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="card_1.html#K1">Card</a> <span class="p1">(<span class="default"><a href="card_3.html#K4" target="_self">product</a> <span class="p2">(<span class="default"><font color="Maroon">N</font> <a href="funcop_1.html#K2">--&gt;</a> <font color="Maroon">M</font></span>)</span></span>)</span> &amp;  <a href="funct_2.html#K1">Funcs</a> <font color="Maroon">N</font>,<font color="Maroon">M</font> <a href="hidden.html#R1">=</a>  <a href="card_3.html#K4" target="_self">product</a> <span class="p1">(<span class="default"><font color="Maroon">N</font> <a href="funcop_1.html#K2">--&gt;</a> <font color="Maroon">M</font></span>)</span> )
 
<b>by </b><i>, <a class="ref" href="card_2.html#D3">CARD_2:def 3</a></i>;<br/>
<b>hence </b><a NAME="E2:49"/>
 <a href="card_3.html#K7" target="_self">Product</a> <span class="p1">(<span class="default"><font color="Maroon">N</font> <a href="funcop_1.html#K2">--&gt;</a> <font color="Maroon">M</font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="card_2.html#K3">exp</a> <font color="Maroon">M</font>,<font color="Maroon">N</font>
 ;<br/>


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