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<b>let </b><font color="Maroon">c<sub>1</sub></font> be  <a href="group_1.html#V1">strict</a> <a href="group_1.html#NM1">Group</a>;<br/>

<a NAME="E1:94"/>
 <a href="group_6.html#K10" target="_self">nat_hom</a> <span class="p1">(<span class="default"><a href="group_2.html#K5">(1).</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="group_6.html#NR3" target="_self">is_isomorphism</a> 
 
<b>by </b><i><a class="ref" href="group_6.html#T75" target="_self">Th75</a></i>;<br/>
<b>hence </b><a NAME="E2:94"/>
<font color="Maroon">c<sub>1</sub></font>,<font color="Maroon">c<sub>1</sub></font> <a href="group_6.html#K6" target="_self">./.</a> <span class="p1">(<span class="default"><a href="group_2.html#K5">(1).</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="group_6.html#R2" target="_self">are_isomorphic</a> 
 <b>by </b><i><a class="ref" href="group_6.html#D15" target="_self">Def15</a></i>;<br/>


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