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<b>let </b><font color="Maroon">X</font> be   <a href="csspace.html#NM1">ComplexUnitarySpace</a>;<br/><b>let </b><font color="Maroon">seq1</font> be   <a href="normsp_1.html#NM2">sequence</a> of <font color="Maroon">X</font>;<br/><b>let </b><font color="Maroon">seq2</font> be   <a href="normsp_1.html#NM2">sequence</a> of <font color="Maroon">X</font>;<br/>





<b>assume </b><b>that </b><br/><a NAME="E1:10"/><i><font color="Green">E45</font></i>: 
<font color="Maroon">seq1</font> is <a href="clvect_3.html#V1" target="_self">summable</a>
 <b>and </b><br/><a NAME="E2:10"/><i><font color="Green">E47</font></i>: 
<font color="Maroon">seq2</font> is <a href="clvect_3.html#V1" target="_self">summable</a>
 ;<br/>

<a NAME="E3:10"/><i><font color="Green">E48</font></i>: 
 <a href="clvect_3.html#K1" target="_self">Partial_Sums</a> <font color="Maroon">seq1</font> is <a href="clvect_2.html#V1">convergent</a>
 
<b>by </b><i>, </i>;<br/>
<a NAME="E4:10"/><i><font color="Green">E50</font></i>: 
 <a href="clvect_3.html#K1" target="_self">Partial_Sums</a> <font color="Maroon">seq2</font> is <a href="clvect_2.html#V1">convergent</a>
 
<b>by </b><i>, </i>;<br/>
<a NAME="E5:10"/><b>then </b>
<span class="p1">(<span class="default"><a href="clvect_3.html#K1" target="_self">Partial_Sums</a> <font color="Maroon">seq1</font></span>)</span> <a href="clvect_1.html#K7">-</a> <span class="p1">(<span class="default"><a href="clvect_3.html#K1" target="_self">Partial_Sums</a> <font color="Maroon">seq2</font></span>)</span> is <a href="clvect_2.html#V1">convergent</a>
 
<b>by </b><i>, <a class="ref" href="clvect_2.html#T4">CLVECT_2:4</a></i>;<br/>
<a NAME="E6:10"/><b>then </b>
 <a href="clvect_3.html#K1" target="_self">Partial_Sums</a> <span class="p1">(<span class="default"><font color="Maroon">seq1</font> <a href="clvect_1.html#K7">-</a> <font color="Maroon">seq2</font></span>)</span> is <a href="clvect_2.html#V1">convergent</a>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E7:10"/>
<font color="Maroon">seq1</font> <a href="clvect_1.html#K7">-</a> <font color="Maroon">seq2</font> is <a href="clvect_3.html#V1" target="_self">summable</a>
 <b>by </b><i/>;<br/>

<b>thus </b> <a href="clvect_3.html#K2" target="_self">Sum</a> <span class="p1">(<span class="default"><font color="Maroon">seq1</font> <a href="clvect_1.html#K7">-</a> <font color="Maroon">seq2</font></span>)</span> = 
 <a href="clvect_2.html#K1">lim</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="clvect_3.html#K1" target="_self">Partial_Sums</a> <font color="Maroon">seq1</font></span>)</span> <a href="clvect_1.html#K7">-</a> <span class="p2">(<span class="default"><a href="clvect_3.html#K1" target="_self">Partial_Sums</a> <font color="Maroon">seq2</font></span>)</span></span>)</span>
<b>by </b><i/>
<br/>.= 
<span class="p1">(<span class="default"><a href="clvect_3.html#K2" target="_self">Sum</a> <font color="Maroon">seq1</font></span>)</span> <a href="rlvect_1.html#K6">-</a> <span class="p1">(<span class="default"><a href="clvect_3.html#K2" target="_self">Sum</a> <font color="Maroon">seq2</font></span>)</span>
<b>by </b><i>, , <a class="ref" href="clvect_2.html#T14">CLVECT_2:14</a></i>
;<br/>


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