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<b>let </b><font color="Maroon">D</font> be  non <a href="xboole_0.html#V1">empty</a>  <a href="hidden.html#M1">set</a> ;<br/>

<b>set </b><font color="Maroon">f</font> =  <a href="finseq_1.html#K6">&lt;*&gt;</a> <span class="p1">(<span class="default"><a href="rfunct_3.html#K4" target="_self">PFuncs</a> <font color="Maroon">D</font>,<a href="numbers.html#K1">REAL</a> </span>)</span>;<br/>
<b>set </b><font color="Maroon">o</font> =  <a href="rfunct_3.html#K14" target="_self">addpfunc</a> <font color="Maroon">D</font>;<br/>
<b>set </b><font color="Maroon">o0</font> = <span class="p1">(<span class="default"><a href="subset_1.html#K2">[#]</a> <font color="Maroon">D</font></span>)</span> <a href="rfunct_3.html#K5" target="_self">--&gt;</a> 0;<br/>
<a NAME="E1:33"/><i><font color="Green">E30</font></i>: 
(  <a href="rfunct_3.html#K14" target="_self">addpfunc</a> <font color="Maroon">D</font> is <a href="binop_1.html#V1">commutative</a> &amp;  <a href="rfunct_3.html#K14" target="_self">addpfunc</a> <font color="Maroon">D</font> is <a href="binop_1.html#V2">associative</a> &amp;  <a href="binop_1.html#K3">the_unity_wrt</a> <span class="p1">(<span class="default"><a href="rfunct_3.html#K14" target="_self">addpfunc</a> <font color="Maroon">D</font></span>)</span> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><a href="subset_1.html#K2">[#]</a> <font color="Maroon">D</font></span>)</span> <a href="rfunct_3.html#K5" target="_self">--&gt;</a> 0 &amp;  <a href="rfunct_3.html#K14" target="_self">addpfunc</a> <font color="Maroon">D</font> <a href="setwiseo.html#NR1" target="_self">has_a_unity</a>  )
 
<b>by </b><i>, , , </i>;<br/>
<b>thus </b><a NAME="E2:33"/>
 <a href="rfunct_3.html#K15" target="_self">Sum</a> <span class="p1">(<span class="default"><a href="finseq_1.html#K6">&lt;*&gt;</a> <span class="p2">(<span class="default"><a href="rfunct_3.html#K4" target="_self">PFuncs</a> <font color="Maroon">D</font>,<a href="numbers.html#K1">REAL</a> </span>)</span></span>)</span> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><a href="subset_1.html#K2">[#]</a> <font color="Maroon">D</font></span>)</span> <a href="rfunct_3.html#K5" target="_self">--&gt;</a> 0
 <b>by </b><i>, <a class="ref" href="finsop_1.html#T11">FINSOP_1:11</a></i>;<br/>


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