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<b>let </b><font color="Maroon">a</font> be   <a href="struct_0.html#NM1">Element</a> of <a href="complfld.html#K1">F_Complex</a> , <font color="Maroon">b</font> be   <a href="struct_0.html#NM1">Element</a> of <a href="complfld.html#K1">F_Complex</a> ;<br/>

<b>assume </b><a NAME="E1:10"/>
(  <a href="complex1.html#K4">Im</a> <font color="Maroon">a</font> <a href="hidden.html#R1">=</a> 0 &amp;  <a href="complex1.html#K4">Im</a> <font color="Maroon">b</font> <a href="hidden.html#R1">=</a> 0 )
 ;<br/>

<b>hence </b> <a href="complex1.html#K4">Im</a> <span class="p1">(<span class="default"><font color="Maroon">a</font> <a href="group_1.html#K10">*</a> <font color="Maroon">b</font></span>)</span> = 
<span class="p1">(<span class="default"><a href="complex1.html#K3">Re</a> <font color="Maroon">b</font></span>)</span> <a href="real_1.html#K4">*</a> 0
<b>by </b><i/>
<br/>.= 
0

;<br/><br/>


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