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<b>let </b><font color="Maroon">N</font> be    <a href="monoid_0.html#M2" target="_self">SubStr</a> of <font color="Maroon">M</font>;<br/>

<a NAME="E1:69_1_1"/>
 <a href="group_1.html#G1">HGrStr</a>(# the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">M</font>,the <a href="group_1.html#U1">mult</a> of <font color="Maroon">M</font> #) <a href="hidden.html#R1">=</a>  <a href="group_1.html#G1">HGrStr</a>(# the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">G</font>,the <a href="group_1.html#U1">mult</a> of <font color="Maroon">G</font> #)
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E2:69_1_1"/>
<font color="Maroon">H<sub>2</sub></font>(<font color="Maroon">N</font>) <a href="funct_4.html#NR1" target="_self">&lt;=</a> <font color="Maroon">H<sub>2</sub></font>(<font color="Maroon">G</font>)
 <b>by </b><i/>; <i><font color="Red">:: according to </font></i><a class="ref" href="monoid_0.html#D23" target="_self">MONOID_0:def 23</a><br/>


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