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<b>let </b><font color="Maroon" title="c1">F</font> be  <a href="grcat_1.html#V2" title="GRCAT_1:attr.2">strict</a> <a href="grcat_1.html#NM1" title="GRCAT_1:NM.1">GroupMorphism</a>;<br/>

<b>consider </b><font color="Maroon" title="c2">G</font>, <font color="Maroon" title="c3">H</font> being   <a href="algstr_1.html#NM2" title="ALGSTR_1:NM.2">AddGroup</a><b> such that </b><br/><a NAME="E2:40"/><i><font color="Green" title="E20">A1</font></i>: 
<font color="Maroon" title="c1">F</font> is    <a href="grcat_1.html#M1" title="GRCAT_1:mode.1">Morphism</a> of <font color="Maroon" title="c2">G</font>,<font color="Maroon" title="c3">H</font>
 <b>by </b><i><a class="ref" href="grcat_1.html#T24" target="_self" title="GRCAT_1:th.24">Th24</a></i>;<br/>
<b>reconsider </b><font color="Maroon" title="c4">F'</font> = <font color="Maroon" title="c1">F</font> as    <a href="grcat_1.html#M1" title="GRCAT_1:mode.1">Morphism</a> of <font color="Maroon" title="c2">G</font>,<font color="Maroon" title="c3">H</font> <b>by </b><i><a class="txt" href="grcat_1.html#E2:40"><i><font color="Green" title="E20">A1</font></i></a></i>;<br/>
<b>consider </b><font color="Maroon" title="c5">f</font> being   <a href="struct_0.html#NM6" title="STRUCT_0:NM.6">Function</a> of <font color="Maroon" title="c2">G</font>,<font color="Maroon" title="c3">H</font><b> such that </b><br/><a NAME="E5:40"/><i><font color="Green" title="E21">A2</font></i>: 
( <font color="Maroon" title="c4">F'</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="grcat_1.html#G1" title="GRCAT_1:aggr.1">GroupMorphismStr</a>(# <font color="Maroon" title="c2">G</font>,<font color="Maroon" title="c3">H</font>,<font color="Maroon" title="c5">f</font> #) &amp; <font color="Maroon" title="c5">f</font> is <a href="grcat_1.html#V1" title="GRCAT_1:attr.1">additive</a> )
 <b>by </b><i><a class="ref" href="grcat_1.html#T22" target="_self" title="GRCAT_1:th.22">Th22</a></i>;<br/>
<b>take </b>
<font color="Maroon" title="c2">G</font>
;<br/>

<b>take </b>
<font color="Maroon" title="c3">H</font>
;<br/>

<b>take </b>
<font color="Maroon" title="c5">f</font>
;<br/>

<b>thus </b><a NAME="E6:40"/>
( <font color="Maroon" title="c1">F</font> is    <a href="grcat_1.html#M1" title="GRCAT_1:mode.1">Morphism</a> of <font color="Maroon" title="c2">G</font>,<font color="Maroon" title="c3">H</font> &amp; <font color="Maroon" title="c1">F</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="grcat_1.html#G1" title="GRCAT_1:aggr.1">GroupMorphismStr</a>(# <font color="Maroon" title="c2">G</font>,<font color="Maroon" title="c3">H</font>,<font color="Maroon" title="c5">f</font> #) &amp; <font color="Maroon" title="c5">f</font> is <a href="grcat_1.html#V1" title="GRCAT_1:attr.1">additive</a> )
 <b>by </b><i><a class="txt" href="grcat_1.html#E5:40"><i><font color="Green" title="E21">A2</font></i></a></i>;<br/>


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