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<b>let </b><font color="Maroon" title="c1">D</font>, <font color="Maroon" title="c2">E</font> be    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ;<br/><b>let </b><font color="Maroon" title="c3">F</font> be    <a href="finseq_1.html#M2" title="FINSEQ_1:mode.2">FinSequence</a> of <font color="Maroon" title="c1">D</font> <a href="finseq_2.html#K3" title="FINSEQ_2:func.3">*</a> ;<br/><b>let </b><font color="Maroon" title="c4">G</font> be    <a href="finseq_1.html#M2" title="FINSEQ_1:mode.2">FinSequence</a> of <font color="Maroon" title="c2">E</font> <a href="finseq_2.html#K3" title="FINSEQ_2:func.3">*</a> ;<br/>





<b>assume </b><a NAME="E1:55"/>
 <a href="polynom1.html#K5" title="POLYNOM1:func.5">Card</a> <font color="Maroon" title="c3">F</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="polynom1.html#K5" title="POLYNOM1:func.5">Card</a> <font color="Maroon" title="c4">G</font>
 ;<br/>

<b>hence </b> <a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p1">(<span class="default"><a href="dtconstr.html#K15" title="DTCONSTR:func.15">FlattenSeq</a> <font color="Maroon" title="c3">F</font></span>)</span> = 
 <a href="wsierp_1.html#K5" title="WSIERP_1:func.5">Sum</a> <span class="p1">(<span class="default"><a href="polynom1.html#K5" title="POLYNOM1:func.5">Card</a> <font color="Maroon" title="c4">G</font></span>)</span>
<b>by </b><i><a class="ref" href="polynom1.html#T30" target="_self" title="POLYNOM1:th.30">Th30</a></i>
<br/>.= 
 <a href="finseq_1.html#K3" title="FINSEQ_1:func.3">len</a> <span class="p1">(<span class="default"><a href="dtconstr.html#K15" title="DTCONSTR:func.15">FlattenSeq</a> <font color="Maroon" title="c4">G</font></span>)</span>
<b>by </b><i><a class="ref" href="polynom1.html#T30" target="_self" title="POLYNOM1:th.30">Th30</a></i>
;<br/><br/>


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