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<b>let </b><font color="Maroon" title="c3">A</font> be   <a href="cat_1.html#NM4" title="CAT_1:NM.4">Category</a>; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide">  ex <font color="Olive" title="b1">F</font> being   <a href="cat_1.html#M2" title="CAT_1:mode.2">Functor</a> of <font color="Maroon" title="c3">A</font>,<font color="Maroon" title="c3">A</font> st <font color="Olive" title="b1">F</font> <a href="isocat_1.html#NR1" title="ISOCAT_1:NR.1">is_an_isomorphism</a> </span><br/>

<a NAME="E1:18_1_1"/>
 <a href="cat_1.html#K15" title="CAT_1:func.15">id</a> <font color="Maroon" title="c3">A</font> <a href="isocat_1.html#NR1" title="ISOCAT_1:NR.1">is_an_isomorphism</a> 
 
<b>by </b><i><a class="ref" href="cat_1.html#T122" title="CAT_1:th.122">CAT_1:122</a></i>;<br/>
<b>hence </b><a NAME="E2:18_1_1"/>
 ex <font color="Olive" title="b1">F</font> being   <a href="cat_1.html#M2" title="CAT_1:mode.2">Functor</a> of <font color="Maroon" title="c3">A</font>,<font color="Maroon" title="c3">A</font> st <font color="Olive" title="b1">F</font> <a href="isocat_1.html#NR1" title="ISOCAT_1:NR.1">is_an_isomorphism</a> 
 ; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> verum</span><br/>


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