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<b>let </b><font color="Maroon">D</font> be    <a href="hidden.html#M1">set</a> , <font color="Maroon">E</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">F</font> be    <a href="finseq_1.html#M2">FinSequence</a> of <font color="Maroon">D</font> <a href="finseq_2.html#K3">*</a> ;<br/><b>let </b><font color="Maroon">G</font> be    <a href="finseq_1.html#M2">FinSequence</a> of <font color="Maroon">E</font> <a href="finseq_2.html#K3">*</a> ;<br/>





<b>assume </b><a NAME="E1:56"/>
 <a href="polynom1.html#K5" target="_self">Card</a> <font color="Maroon">F</font> <a href="hidden.html#R1">=</a>  <a href="polynom1.html#K5" target="_self">Card</a> <font color="Maroon">G</font>
 ;<br/>

<b>hence </b> <a href="finseq_1.html#K3">len</a> <span class="p1">(<span class="default"><a href="dtconstr.html#K15">FlattenSeq</a> <font color="Maroon">F</font></span>)</span> = 
 <a href="wsierp_1.html#K7">Sum</a> <span class="p1">(<span class="default"><a href="polynom1.html#K5" target="_self">Card</a> <font color="Maroon">G</font></span>)</span>
<b>by </b><i/>
<br/>.= 
 <a href="finseq_1.html#K3">len</a> <span class="p1">(<span class="default"><a href="dtconstr.html#K15">FlattenSeq</a> <font color="Maroon">G</font></span>)</span>
<b>by </b><i/>
;<br/><br/>


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