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<b>let </b><font color="Maroon">c<sub>1</sub></font>, <font color="Maroon">c<sub>2</sub></font> be  <a href="grcat_1.html#V2" target="_self">strict</a> <a href="grcat_1.html#NM1">GroupMorphism</a>;<br/>

<b>assume </b><a NAME="E1:50"/><i><font color="Green">E29</font></i>: 
 <a href="grcat_1.html#K9" target="_self">dom</a> <font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a>  <a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>1</sub></font>
 ;<br/>

<b>set </b><font color="Maroon">c<sub>3</sub></font> =  <a href="grcat_1.html#K9" target="_self">dom</a> <font color="Maroon">c<sub>1</sub></font>;<br/>
<b>set </b><font color="Maroon">c<sub>4</sub></font> =  <a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>1</sub></font>;<br/>
<b>set </b><font color="Maroon">c<sub>5</sub></font> =  <a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>2</sub></font>;<br/>
<b>reconsider </b><font color="Maroon">c<sub>6</sub></font> = <font color="Maroon">c<sub>1</sub></font> as  <a href="grcat_1.html#V2" target="_self">strict</a>  <a href="grcat_1.html#M1" target="_self">Morphism</a> of  <a href="grcat_1.html#K9" target="_self">dom</a> <font color="Maroon">c<sub>1</sub></font>, <a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>1</sub></font> <b>by </b><i><a class="ref" href="grcat_1.html#D19" target="_self">Def19</a></i>;<br/>
<b>reconsider </b><font color="Maroon">c<sub>7</sub></font> = <font color="Maroon">c<sub>2</sub></font> as  <a href="grcat_1.html#V2" target="_self">strict</a>  <a href="grcat_1.html#M1" target="_self">Morphism</a> of  <a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>1</sub></font>, <a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>2</sub></font> <b>by </b><i><a class="txt" href="grcat_1.html#E1:50"><i><font color="Green">E29</font></i></a>, <a class="ref" href="grcat_1.html#D19" target="_self">Def19</a></i>;<br/>
<b>consider </b><font color="Maroon">c<sub>8</sub></font> being   <a href="struct_0.html#NM7">Function</a> of <span class="p1">(<span class="default"><a href="grcat_1.html#K9" target="_self">dom</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>,<span class="p1">(<span class="default"><a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>1</sub></font></span>)</span><b> such that </b><br/><a NAME="E5:50"/><i><font color="Green">E30</font></i>: 
<font color="Maroon">c<sub>6</sub></font> <a href="hidden.html#R1">=</a>  <a href="grcat_1.html#G1" target="_self">GroupMorphismStr</a>(# <span class="p1">(<span class="default"><a href="grcat_1.html#K9" target="_self">dom</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>,<span class="p1">(<span class="default"><a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>,<font color="Maroon">c<sub>8</sub></font> #)
 ;<br/>
<b>consider </b><font color="Maroon">c<sub>9</sub></font> being   <a href="struct_0.html#NM7">Function</a> of <span class="p1">(<span class="default"><a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>,<span class="p1">(<span class="default"><a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>2</sub></font></span>)</span><b> such that </b><br/><a NAME="E7:50"/><i><font color="Green">E31</font></i>: 
<font color="Maroon">c<sub>7</sub></font> <a href="hidden.html#R1">=</a>  <a href="grcat_1.html#G1" target="_self">GroupMorphismStr</a>(# <span class="p1">(<span class="default"><a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>,<span class="p1">(<span class="default"><a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>2</sub></font></span>)</span>,<font color="Maroon">c<sub>9</sub></font> #)
 <b>by </b><i><a class="ref" href="grcat_1.html#T23" target="_self">Th23</a></i>;<br/>
<b>take </b>
 <a href="grcat_1.html#K9" target="_self">dom</a> <font color="Maroon">c<sub>1</sub></font>
;<br/>

<b>take </b>
 <a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>1</sub></font>
;<br/>

<b>take </b>
 <a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>2</sub></font>
;<br/>

<b>take </b>
<font color="Maroon">c<sub>8</sub></font>
;<br/>

<b>take </b>
<font color="Maroon">c<sub>9</sub></font>
;<br/>

<b>thus </b><a NAME="E8:50"/>
( <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="grcat_1.html#G1" target="_self">GroupMorphismStr</a>(# <span class="p1">(<span class="default"><a href="grcat_1.html#K9" target="_self">dom</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>,<span class="p1">(<span class="default"><a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>,<font color="Maroon">c<sub>8</sub></font> #) &amp; <font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a>  <a href="grcat_1.html#G1" target="_self">GroupMorphismStr</a>(# <span class="p1">(<span class="default"><a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>,<span class="p1">(<span class="default"><a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>2</sub></font></span>)</span>,<font color="Maroon">c<sub>9</sub></font> #) &amp; <font color="Maroon">c<sub>2</sub></font> <a href="grcat_1.html#K15" target="_self">*</a> <font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a>  <a href="grcat_1.html#G1" target="_self">GroupMorphismStr</a>(# <span class="p1">(<span class="default"><a href="grcat_1.html#K9" target="_self">dom</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>,<span class="p1">(<span class="default"><a href="grcat_1.html#K10" target="_self">cod</a> <font color="Maroon">c<sub>2</sub></font></span>)</span>,<span class="p1">(<span class="default"><font color="Maroon">c<sub>9</sub></font> <a href="partfun1.html#K1">*</a> <font color="Maroon">c<sub>8</sub></font></span>)</span> #) )
 <b>by </b><i><a class="txt" href="grcat_1.html#E5:50"><i><font color="Green">E30</font></i></a>, <a class="txt" href="grcat_1.html#E7:50"><i><font color="Green">E31</font></i></a>, <a class="ref" href="grcat_1.html#T29" target="_self">Th29</a></i>;<br/>


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