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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="group_1.html#NM1">Group</a>;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font>;<br/>



<b>thus </b><font color="Maroon">c<sub>2</sub></font> <a href="group_1.html#K6" target="_self">|^</a> 1 = 
<font color="Maroon">c<sub>2</sub></font> <a href="group_1.html#K6" target="_self">|^</a> <span class="p1">(<span class="default">0 <a href="nat_1.html#K1">+</a> 1</span>)</span>

<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="group_1.html#K6" target="_self">|^</a> 0</span>)</span> <a href="group_1.html#K1" target="_self">*</a> <font color="Maroon">c<sub>2</sub></font>
<b>by </b><i><a class="txt" href="group_1.html#E49"><i><font color="Green">Lemma28</font></i></a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="group_1.html#K2" target="_self">1.</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="group_1.html#K1" target="_self">*</a> <font color="Maroon">c<sub>2</sub></font>
<b>by </b><i><a class="txt" href="group_1.html#E50"><i><font color="Green">Lemma29</font></i></a></i>
<br/>.= 
<font color="Maroon">c<sub>2</sub></font>
<b>by </b><i><a class="ref" href="group_1.html#D5" target="_self">Def5</a></i>
;<br/>


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