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<b>let </b><font color="Maroon">X</font> be    <a href="functor2.html#M1">transformation</a> of <font color="Maroon">G</font> <a href="functor3.html#K1" target="_self">*</a> <font color="Maroon">F1</font>,<font color="Maroon">G</font> <a href="functor3.html#K1" target="_self">*</a> <font color="Maroon">F2</font>, <font color="Maroon">Y</font> be    <a href="functor2.html#M1">transformation</a> of <font color="Maroon">G</font> <a href="functor3.html#K1" target="_self">*</a> <font color="Maroon">F1</font>,<font color="Maroon">G</font> <a href="functor3.html#K1" target="_self">*</a> <font color="Maroon">F2</font>;<br/>

<b>assume </b><b>that </b><br/><a NAME="E1:24_1_2"/><i><font color="Green">E35</font></i>: 
for <font color="Olive">o</font> being  <a href="altcat_1.html#NM1">object</a> of <font color="Maroon">A</font> holds  <font color="Maroon">X</font> <a href="funct_1.html#K1">.</a> <font color="Olive">o</font> <a href="hidden.html#R1">=</a> <font color="Maroon">G</font> <a href="functor0.html#K6">.</a> <span class="p1">(<span class="default"><font color="Maroon">t</font> <a href="functor2.html#K2">!</a> <font color="Olive">o</font></span>)</span>
 <b>and </b><br/><a NAME="E2:24_1_2"/><i><font color="Green">E44</font></i>: 
for <font color="Olive">o</font> being  <a href="altcat_1.html#NM1">object</a> of <font color="Maroon">A</font> holds  <font color="Maroon">Y</font> <a href="funct_1.html#K1">.</a> <font color="Olive">o</font> <a href="hidden.html#R1">=</a> <font color="Maroon">G</font> <a href="functor0.html#K6">.</a> <span class="p1">(<span class="default"><font color="Maroon">t</font> <a href="functor2.html#K2">!</a> <font color="Olive">o</font></span>)</span>
 ;<br/>

<a NAME="E3:24_1_2"/><i><font color="Green">E45</font></i>: 
<font color="Maroon">G</font> <a href="functor3.html#K1" target="_self">*</a> <font color="Maroon">F1</font> <a href="functor2.html#R1">is_transformable_to</a> <font color="Maroon">G</font> <a href="functor3.html#K1" target="_self">*</a> <font color="Maroon">F2</font>
 
<b>by </b><i>, </i>;<br/>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="24_1_2_1"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">o</font> be   <a href="altcat_1.html#NM1">object</a> of <font color="Maroon">A</font>;<br/><b>thus </b><font color="Maroon">X</font> <a href="functor2.html#K2">!</a> <font color="Maroon">o</font> = 
<font color="Maroon">X</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">o</font>
<b>by </b><i>, <a class="ref" href="functor2.html#D4">FUNCTOR2:def 4</a></i>
<br/>.= 
<font color="Maroon">G</font> <a href="functor0.html#K6">.</a> <span class="p1">(<span class="default"><font color="Maroon">t</font> <a href="functor2.html#K2">!</a> <font color="Maroon">o</font></span>)</span>
<b>by </b><i/>
<br/>.= 
<font color="Maroon">Y</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">o</font>
<b>by </b><i/>
<br/>.= 
<font color="Maroon">Y</font> <a href="functor2.html#K2">!</a> <font color="Maroon">o</font>
<b>by </b><i>, <a class="ref" href="functor2.html#D4">FUNCTOR2:def 4</a></i>
;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E5:24_1_2"/>
<font color="Maroon">X</font> <a href="hidden.html#R1">=</a> <font color="Maroon">Y</font>
 <b>by </b><i>, <a class="ref" href="functor2.html#T5">FUNCTOR2:5</a></i>;<br/>


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