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<b>let </b><font color="Maroon" title="c1">G</font> be  <a href="group_1.html#V1" title="GROUP_1:attr.1">strict</a> <a href="group_1.html#NM1" title="GROUP_1:NM.1">Group</a>;<br/><b>let </b><font color="Maroon" title="c2">f1</font>, <font color="Maroon" title="c3">f2</font> be    <a href="fraenkel.html#M2" title="FRAENKEL:mode.2">Element</a> of  <a href="autgroup.html#K1" title="AUTGROUP:func.1">Aut</a> <font color="Maroon" title="c1">G</font>;<br/>



<b>reconsider </b><font color="Maroon" title="c4">f1</font> = <font color="Maroon" title="c2">f1</font>, <font color="Maroon" title="c5">f2</font> = <font color="Maroon" title="c3">f2</font> as   <a href="group_6.html#NM2" title="GROUP_6:NM.2">Homomorphism</a> of <font color="Maroon" title="c1">G</font>,<font color="Maroon" title="c1">G</font> <b>by </b><i><a class="ref" href="autgroup.html#D1" target="_self" title="AUTGROUP:def.1">Def1</a></i>;<br/>
<a NAME="E2:10"/>
( <font color="Maroon" title="c4">f1</font> <a href="group_6.html#NR3" title="GROUP_6:NR.3">is_isomorphism</a>  &amp; <font color="Maroon" title="c5">f2</font> <a href="group_6.html#NR3" title="GROUP_6:NR.3">is_isomorphism</a>  )
 
<b>by </b><i><a class="ref" href="autgroup.html#T5" target="_self" title="AUTGROUP:th.5">Th5</a></i>;<br/>
<a NAME="E3:10"/><b>then </b>
<font color="Maroon" title="c4">f1</font> <a href="group_6.html#K8" title="GROUP_6:func.8">*</a> <font color="Maroon" title="c5">f2</font> <a href="group_6.html#NR3" title="GROUP_6:NR.3">is_isomorphism</a> 
 
<b>by </b><i><a class="ref" href="group_6.html#T74" title="GROUP_6:th.74">GROUP_6:74</a></i>;<br/>
<b>hence </b><a NAME="E4:10"/>
<font color="Maroon" title="c2">f1</font> <a href="partfun1.html#K1" title="PARTFUN1:func.1">*</a> <font color="Maroon" title="c3">f2</font> is    <a href="fraenkel.html#M2" title="FRAENKEL:mode.2">Element</a> of  <a href="autgroup.html#K1" title="AUTGROUP:func.1">Aut</a> <font color="Maroon" title="c1">G</font>
 <b>by </b><i><a class="ref" href="autgroup.html#T5" target="_self" title="AUTGROUP:th.5">Th5</a></i>;<br/>


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