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<b>let </b><font color="Maroon">G</font> be   <a href="group_1.html#NM1">Group</a>;<br/><b>let </b><font color="Maroon">H1</font> be    <a href="group_2.html#M1">Subgroup</a> of <font color="Maroon">G</font>;<br/><b>let </b><font color="Maroon">H2</font> be    <a href="group_2.html#M1">Subgroup</a> of <font color="Maroon">G</font>;<br/>





<b>assume </b><a NAME="E1:63"/>
<font color="Maroon">G</font> is  <a href="group_1.html#V7">commutative</a> <a href="group_1.html#NM1">Group</a>
 ;<br/>

<a NAME="E2:63"/><b>then </b>
<font color="Maroon">H1</font> <a href="group_4.html#K7" target="_self">*</a> <font color="Maroon">H2</font> <a href="hidden.html#R1">=</a> <font color="Maroon">H2</font> <a href="group_4.html#K7" target="_self">*</a> <font color="Maroon">H1</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E3:63"/>
the <a href="struct_0.html#U1">carrier</a> of <span class="p1">(<span class="default"><font color="Maroon">H1</font> <a href="group_4.html#K8" target="_self">"\/"</a> <font color="Maroon">H2</font></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">H1</font> <a href="group_4.html#K7" target="_self">*</a> <font color="Maroon">H2</font>
 <b>by </b><i/>;<br/>


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