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<b>let </b><font color="Maroon">K</font> be   <a href="vectsp_1.html#NM2">Field</a>;<br/><b>let </b><font color="Maroon">p</font> be   <a href="struct_0.html#NM7">FinSequence</a> of <font color="Maroon">K</font>, <font color="Maroon">q</font> be   <a href="struct_0.html#NM7">FinSequence</a> of <font color="Maroon">K</font>;<br/>



<b>assume </b><a NAME="E1:13"/><i><font color="Green">E43</font></i>: 
 <a href="finseq_1.html#K3">len</a> <font color="Maroon">p</font> <a href="hidden.html#R1">=</a>  <a href="finseq_1.html#K3">len</a> <font color="Maroon">q</font>
 ;<br/>

<b>reconsider </b><font color="Maroon">r</font> =  <a href="fvsum_1.html#K11">mlt</a> <font color="Maroon">p</font>,<font color="Maroon">q</font> as   <a href="struct_0.html#NM7">FinSequence</a> of <font color="Maroon">K</font> ;<br/>
<a NAME="E3:13"/>
<font color="Maroon">r</font> <a href="hidden.html#R1">=</a> the <a href="group_1.html#U1">mult</a> of <font color="Maroon">K</font> <a href="finseqop.html#K1">.:</a> <font color="Maroon">p</font>,<font color="Maroon">q</font>
 
<b>by </b><i><a class="ref" href="fvsum_1.html#D7">FVSUM_1:def 7</a></i>;<br/>
<b>hence </b><a NAME="E4:13"/>
(  <a href="finseq_1.html#K3">len</a> <span class="p1">(<span class="default"><a href="fvsum_1.html#K11">mlt</a> <font color="Maroon">p</font>,<font color="Maroon">q</font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="finseq_1.html#K3">len</a> <font color="Maroon">p</font> &amp;  <a href="finseq_1.html#K3">len</a> <span class="p1">(<span class="default"><a href="fvsum_1.html#K11">mlt</a> <font color="Maroon">p</font>,<font color="Maroon">q</font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="finseq_1.html#K3">len</a> <font color="Maroon">q</font> )
 <b>by </b><i>, <a class="ref" href="finseq_2.html#T86">FINSEQ_2:86</a></i>;<br/>


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