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<b>let </b><font color="Maroon">r1</font> be  <a href="xcmplx_0.html#V1">complex</a>  <a href="ordinal1.html#NM1" target="_self">number</a> , <font color="Maroon">r2</font> be  <a href="xcmplx_0.html#V1">complex</a>  <a href="ordinal1.html#NM1" target="_self">number</a> , <font color="Maroon">r3</font> be  <a href="xcmplx_0.html#V1">complex</a>  <a href="ordinal1.html#NM1" target="_self">number</a> ;<br/>

<b>thus </b> <a href="rvsum_1.html#K16" target="_self">Product</a> <span class="p1"><a href="finseq_1.html#K11">&lt;*</a><span class="default"><font color="Maroon">r1</font>,<font color="Maroon">r2</font>,<font color="Maroon">r3</font></span><a href="finseq_1.html#K11">*&gt;</a></span> = 
<span class="p1">(<span class="default"><a href="rvsum_1.html#K16" target="_self">Product</a> <span class="p2"><a href="finseq_1.html#K10">&lt;*</a><span class="default"><font color="Maroon">r1</font>,<font color="Maroon">r2</font></span><a href="finseq_1.html#K10">*&gt;</a></span></span>)</span> <a href="xcmplx_0.html#K3">*</a> <font color="Maroon">r3</font>
<b>by </b><i/>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon">r1</font> <a href="xcmplx_0.html#K3">*</a> <font color="Maroon">r2</font></span>)</span> <a href="xcmplx_0.html#K3">*</a> <font color="Maroon">r3</font>
<b>by </b><i><a class="ref" href="rvsum_1.html#T27" target="_self">Th27</a></i>
;<br/>


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