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<b>let </b><font color="Maroon">i</font> be    <a href="subset_1.html#M2">Element</a> of  <a href="numbers.html#K5">NAT</a> ;<br/>

<b>thus </b> <a href="rvsum_1.html#K15" target="_self">Sum</a> <span class="p1">(<span class="default"><font color="Maroon">i</font> <a href="finseqop.html#K4">|-&gt;</a> 0</span>)</span> = 
<font color="Maroon">i</font> <a href="binop_2.html#K24">*</a> 0
<b>by </b><i/>
<br/>.= 
0

;<br/>


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