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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="cat_1.html#NM4">Category</a>;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font> be   <a href="cat_1.html#NM1">Object</a> of <font color="Maroon">c<sub>1</sub></font>;<br/><b>let </b><font color="Maroon">c<sub>3</sub></font> be   <a href="funct_2.html#NM1">Function</a> of  <a href="xboole_0.html#K1">{}</a> ,the <a href="cat_1.html#U2">Morphisms</a> of <font color="Maroon">c<sub>1</sub></font>;<br/>





<b>thus </b><a href="xboole_0.html#K1">{}</a>  <a href="cat_3.html#K1" target="_self">--&gt;</a> <font color="Maroon">c<sub>2</sub></font> = 
 <a href="xboole_0.html#K1">{}</a> 

<br/>.= 
 <a href="cat_3.html#K4" target="_self">cods</a> <font color="Maroon">c<sub>3</sub></font>
<b>by </b><i><a class="ref" href="partfun1.html#T57">PARTFUN1:57</a></i>
; <i><font color="Red">:: according to </font></i><a class="ref" href="cat_3.html#D17" target="_self">CAT_3:def 17</a><br/>


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