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<b>let </b><font color="Maroon" title="c3">T1</font>, <font color="Maroon" title="c4">T2</font> be  <a href="cat_1.html#V1" title="CAT_1:attr.1">strict</a>  <a href="index_1.html#M4" title="INDEX_1:mode.4">TargetCat</a> of <font color="Maroon" title="c2">I</font>;<br/>

<b>assume </b><b>that </b><br/><a NAME="E1:47_1_1"/><i><font color="Green" title="E21">A1</font></i>: 
for <font color="Olive" title="b1">T</font> being   <a href="index_1.html#M4" title="INDEX_1:mode.4">TargetCat</a> of <font color="Maroon" title="c2">I</font> holds  <font color="Maroon" title="c3">T1</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="cat_5.html#K7" title="CAT_5:func.7">Image</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">I</font> <a href="index_1.html#K15" title="INDEX_1:func.15">-functor</a> <font color="Maroon" title="c1">C</font>,<font color="Olive" title="b1">T</font></span>)</span>
 <b>and </b><br/><a NAME="E2:47_1_1"/><i><font color="Green" title="E22">A2</font></i>: 
for <font color="Olive" title="b1">T</font> being   <a href="index_1.html#M4" title="INDEX_1:mode.4">TargetCat</a> of <font color="Maroon" title="c2">I</font> holds  <font color="Maroon" title="c4">T2</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="cat_5.html#K7" title="CAT_5:func.7">Image</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">I</font> <a href="index_1.html#K15" title="INDEX_1:func.15">-functor</a> <font color="Maroon" title="c1">C</font>,<font color="Olive" title="b1">T</font></span>)</span>
 ;<br/>

<b>consider </b><font color="Maroon" title="c5">T</font> being    <a href="index_1.html#M4" title="INDEX_1:mode.4">TargetCat</a> of <font color="Maroon" title="c2">I</font>;<br/>
<b>thus </b><font color="Maroon" title="c3">T1</font> = 
 <a href="cat_5.html#K7" title="CAT_5:func.7">Image</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">I</font> <a href="index_1.html#K15" title="INDEX_1:func.15">-functor</a> <font color="Maroon" title="c1">C</font>,<font color="Maroon" title="c5">T</font></span>)</span>
<b>by </b><i><a class="txt" href="index_1.html#E1:47_1_1"><i><font color="Green" title="E21">A1</font></i></a></i>
<br/>.= 
<font color="Maroon" title="c4">T2</font>
<b>by </b><i><a class="txt" href="index_1.html#E2:47_1_1"><i><font color="Green" title="E22">A2</font></i></a></i>
;<br/>


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