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<b>let </b><font color="Maroon">A</font> be  non <a href="struct_0.html#V3">empty</a> <a href="altcat_2.html#V1">reflexive</a>  <a href="altcat_1.html#L2">AltCatStr</a> , <font color="Maroon">I</font> be  non <a href="struct_0.html#V3">empty</a> <a href="altcat_2.html#V1">reflexive</a>  <a href="altcat_1.html#L2">AltCatStr</a> ;<br/><b>let </b><font color="Maroon">B</font> be  non <a href="struct_0.html#V3">empty</a> <a href="altcat_2.html#V1">reflexive</a>  <a href="altcat_2.html#M1">SubCatStr</a> of <font color="Maroon">A</font>;<br/><b>let </b><font color="Maroon">C</font> be  non <a href="struct_0.html#V3">empty</a>  <a href="altcat_2.html#M1">SubCatStr</a> of <font color="Maroon">A</font>;<br/><b>let </b><font color="Maroon">D</font> be  non <a href="struct_0.html#V3">empty</a>  <a href="altcat_2.html#M1">SubCatStr</a> of <font color="Maroon">B</font>;<br/>







<b>assume </b><a NAME="E1:17"/><i><font color="Green">E29</font></i>: 
<font color="Maroon">C</font> <a href="hidden.html#R1">=</a> <font color="Maroon">D</font>
 ;<br/>

<b>let </b><font color="Maroon">F</font> be    <a href="functor0.html#L2">FunctorStr</a> of <font color="Maroon">A</font>,<font color="Maroon">I</font>;<br/>

<b>thus </b><font color="Maroon">F</font> <a href="functor0.html#K14">|</a> <font color="Maroon">C</font> = 
<font color="Maroon">F</font> <a href="functor0.html#K13">*</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="functor0.html#K10">incl</a> <font color="Maroon">B</font></span>)</span> <a href="functor0.html#K13">*</a> <span class="p2">(<span class="default"><a href="functor0.html#K10">incl</a> <font color="Maroon">D</font></span>)</span></span>)</span>
<b>by </b><i>, </i>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon">F</font> <a href="functor0.html#K14">|</a> <font color="Maroon">B</font></span>)</span> <a href="functor0.html#K14">|</a> <font color="Maroon">D</font>
<b>by </b><i><a class="ref" href="functor0.html#T33">FUNCTOR0:33</a></i>
;<br/>


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