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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>let </b><font color="Maroon">R1</font> be    <a href="finseq_2.html#M2">Element</a> of <font color="Maroon">i</font> <a href="finseq_2.html#K4">-tuples_on</a> <a href="numbers.html#K1">REAL</a> ;<br/><b>let </b><font color="Maroon">R2</font> be    <a href="finseq_2.html#M2">Element</a> of <font color="Maroon">i</font> <a href="finseq_2.html#K4">-tuples_on</a> <a href="numbers.html#K1">REAL</a> ;<br/>





<b>assume </b><a NAME="E1:22"/>
 <a href="rvsum_1.html#K6" target="_self">-</a> <font color="Maroon">R1</font> <a href="hidden.html#R1">=</a>  <a href="rvsum_1.html#K6" target="_self">-</a> <font color="Maroon">R2</font>
 ;<br/>

<b>hence </b><font color="Maroon">R1</font> = 
 <a href="rvsum_1.html#K6" target="_self">-</a> <span class="p1">(<span class="default"><a href="rvsum_1.html#K6" target="_self">-</a> <font color="Maroon">R2</font></span>)</span>

<br/>.= 
<font color="Maroon">R2</font>

;<br/><br/>


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