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<b>consider </b><font color="Maroon">c<sub>4</sub></font>, <font color="Maroon">c<sub>5</sub></font> being    <a href="subset_1.html#M2">Element</a> of <font color="Maroon">c<sub>2</sub></font> <a href="cat_5.html#K13" target="_self">Hom</a> , <font color="Maroon">c<sub>6</sub></font> being   <a href="cat_1.html#NM2">Morphism</a> of <font color="Maroon">c<sub>1</sub></font><b> such that </b><br/><a NAME="E2:57_2_1"/><i><font color="Green">E36</font></i>: 
( <font color="Maroon">c<sub>3</sub></font> <a href="hidden.html#R1">=</a> <span class="p1"><a href="cat_2.html#K13">[</a><span class="default"><span class="p2"><a href="cat_2.html#K13">[</a><span class="default"><font color="Maroon">c<sub>4</sub></font>,<font color="Maroon">c<sub>5</sub></font></span><a href="cat_2.html#K13">]</a></span>,<font color="Maroon">c<sub>6</sub></font></span><a href="cat_2.html#K13">]</a></span> &amp;  <a href="cat_1.html#K2">dom</a> <font color="Maroon">c<sub>6</sub></font> <a href="hidden.html#R1">=</a>  <a href="cat_1.html#K3">cod</a> <font color="Maroon">c<sub>4</sub></font> &amp; <font color="Maroon">c<sub>6</sub></font> <a href="cat_1.html#K4">*</a> <font color="Maroon">c<sub>4</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>5</sub></font> )
 <b>by </b><i><a class="ref" href="cat_5.html#D12" target="_self">Def12</a></i>;<br/>
<b>thus </b><a NAME="E3:57_2_1"/>
<font color="Maroon">c<sub>3</sub></font> <a href="mcart_1.html#K17">`11</a>  is    <a href="subset_1.html#M2">Element</a> of <font color="Maroon">c<sub>2</sub></font> <a href="cat_5.html#K13" target="_self">Hom</a> 
 <b>by </b><i><a class="txt" href="cat_5.html#E2:57_2_1"><i><font color="Green">E36</font></i></a>, <a class="ref" href="mcart_1.html#T89">MCART_1:89</a></i>;<br/>


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