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<a NAME="E1:3_1_1"/>
( <font color="Maroon">c<sub>2</sub></font> <a href="cat_5.html#K8">`11</a>  <a href="hidden.html#R1">=</a>  <a href="cat_5.html#K10">cat</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="cat_5.html#K8">`11</a> </span>)</span> &amp; <font color="Maroon">c<sub>2</sub></font> <a href="cat_5.html#K9">`12</a>  <a href="hidden.html#R1">=</a>  <a href="cat_5.html#K10">cat</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="cat_5.html#K9">`12</a> </span>)</span> &amp;  <a href="cat_1.html#K2">dom</a> <font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>2</sub></font> <a href="cat_5.html#K8">`11</a>  &amp;  <a href="cat_1.html#K3">cod</a> <font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>2</sub></font> <a href="cat_5.html#K9">`12</a>  )
 
<b>by </b><i><a class="ref" href="cat_5.html#T2">CAT_5:2</a>, <a class="ref" href="cat_5.html#D7">CAT_5:def 7</a></i>;<br/>
<b>hence </b><a NAME="E2:3_1_1"/>
<font color="Maroon">c<sub>2</sub></font> <a href="cat_5.html#K11">`2</a>  is    <a href="cat_1.html#M2">Functor</a> of <font color="Maroon">c<sub>2</sub></font> <a href="cat_5.html#K8">`11</a> ,<font color="Maroon">c<sub>2</sub></font> <a href="cat_5.html#K9">`12</a> 
 ;<br/>


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