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<b>let </b><font color="Maroon">G1</font> be   <a href="group_1.html#NM1">Group</a>;<br/><b>let </b><font color="Maroon">f</font> be   <a href="funct_2.html#NM1">Function</a> of the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">G1</font>,the <a href="struct_0.html#U1">carrier</a> of <span class="p1">(<span class="default"><a href="group_7.html#K2" target="_self">product</a> <span class="p2"><a href="group_7.html#K8" target="_self">&lt;*</a><span class="default"><font color="Maroon">G1</font></span><a href="group_7.html#K8" target="_self">*&gt;</a></span></span>)</span>;<br/>



<b>assume </b><a NAME="E1:85"/><i><font color="Green">E29</font></i>: 
for <font color="Olive">x</font> being  <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">G1</font> holds  <font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Olive">x</font> <a href="hidden.html#R1">=</a> <span class="p1"><a href="group_7.html#K10" target="_self">&lt;*</a><span class="default"><font color="Olive">x</font></span><a href="group_7.html#K10" target="_self">*&gt;</a></span>
 ;<br/>

<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="85_1"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">a</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">G1</font>, <font color="Maroon">b</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">G1</font>;<br/><b>thus </b><font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <span class="p1">(<span class="default"><font color="Maroon">a</font> <a href="group_1.html#K1">*</a> <font color="Maroon">b</font></span>)</span> = 
<span class="p1"><a href="group_7.html#K10" target="_self">&lt;*</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon">a</font> <a href="group_1.html#K1">*</a> <font color="Maroon">b</font></span>)</span></span><a href="group_7.html#K10" target="_self">*&gt;</a></span>
<b>by </b><i><a class="ref" href="group_7.html#D1" target="_self">Def1</a></i>
<br/>.= 
<span class="p1"><a href="group_7.html#K10" target="_self">&lt;*</a><span class="default"><font color="Maroon">a</font></span><a href="group_7.html#K10" target="_self">*&gt;</a></span> <a href="group_1.html#K1">*</a> <span class="p1"><a href="group_7.html#K10" target="_self">&lt;*</a><span class="default"><font color="Maroon">b</font></span><a href="group_7.html#K10" target="_self">*&gt;</a></span>
<b>by </b><i/>
<br/>.= 
<span class="p1"><a href="group_7.html#K10" target="_self">&lt;*</a><span class="default"><font color="Maroon">a</font></span><a href="group_7.html#K10" target="_self">*&gt;</a></span> <a href="group_1.html#K1">*</a> <span class="p1">(<span class="default"><font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font></span>)</span>
<b>by </b><i><a class="ref" href="group_7.html#D1" target="_self">Def1</a></i>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">a</font></span>)</span> <a href="group_1.html#K1">*</a> <span class="p1">(<span class="default"><font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">b</font></span>)</span>
<b>by </b><i><a class="ref" href="group_7.html#D1" target="_self">Def1</a></i>
;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E3:85"/>
<font color="Maroon">f</font> is   <a href="group_6.html#NM2">Homomorphism</a> of <font color="Maroon">G1</font>,<span class="p1">(<span class="default"><a href="group_7.html#K2" target="_self">product</a> <span class="p2"><a href="group_7.html#K8" target="_self">&lt;*</a><span class="default"><font color="Maroon">G1</font></span><a href="group_7.html#K8" target="_self">*&gt;</a></span></span>)</span>
 <b>by </b><i><a class="ref" href="group_6.html#D7">GROUP_6:def 7</a></i>;<br/>


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