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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="lopban_2.html#NM3">Banach_Algebra</a>;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font>, <font color="Maroon">c<sub>3</sub></font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font>;<br/>





<b>assume </b><a NAME="E1:50"/><i><font color="Green">E49</font></i>: 
<font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>3</sub></font> <a href="lopban_4.html#R1" target="_self">are_commutative</a> 
 ;<br/>

<i><font color="Green">E50</font></i>:  <a href="lopban_4.html#K10" target="_self">exp</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="rlvect_1.html#K4">+</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> = 
<span class="p1">(<span class="default"><a href="lopban_4.html#K9" target="_self">exp_</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="funct_2.html#K3">.</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="rlvect_1.html#K4">+</a> <font color="Maroon">c<sub>3</sub></font></span>)</span>

<br/>.= 
 <a href="lopban_3.html#K2">Sum</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="rlvect_1.html#K4">+</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="lopban_4.html#K1" target="_self">ExpSeq</a> </span>)</span>
<b>by </b><i><a class="ref" href="lopban_4.html#D10" target="_self">Def10</a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="lopban_3.html#K2">Sum</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="lopban_4.html#K1" target="_self">ExpSeq</a> </span>)</span></span>)</span> <a href="group_1.html#K1">*</a> <span class="p1">(<span class="default"><a href="lopban_3.html#K2">Sum</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="lopban_4.html#K1" target="_self">ExpSeq</a> </span>)</span></span>)</span>
<b>by </b><i><a class="txt" href="lopban_4.html#E1:50"><i><font color="Green">E49</font></i></a>, <a class="txt" href="lopban_4.html#E45"><i><font color="Green">Lemma45</font></i></a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="lopban_4.html#K10" target="_self">exp</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="group_1.html#K1">*</a> <span class="p1">(<span class="default"><a href="lopban_3.html#K2">Sum</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="lopban_4.html#K1" target="_self">ExpSeq</a> </span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="lopban_4.html#T34" target="_self">Th34</a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="lopban_4.html#K10" target="_self">exp</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="group_1.html#K1">*</a> <span class="p1">(<span class="default"><a href="lopban_4.html#K10" target="_self">exp</a> <font color="Maroon">c<sub>3</sub></font></span>)</span>
<b>by </b><i><a class="ref" href="lopban_4.html#T34" target="_self">Th34</a></i>
;<br/>
 <a href="lopban_4.html#K10" target="_self">exp</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="rlvect_1.html#K4">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> = 
<span class="p1">(<span class="default"><a href="lopban_4.html#K9" target="_self">exp_</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="funct_2.html#K3">.</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="rlvect_1.html#K4">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span>

<br/>.= 
 <a href="lopban_3.html#K2">Sum</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="rlvect_1.html#K4">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="lopban_4.html#K1" target="_self">ExpSeq</a> </span>)</span>
<b>by </b><i><a class="ref" href="lopban_4.html#D10" target="_self">Def10</a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="lopban_3.html#K2">Sum</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="lopban_4.html#K1" target="_self">ExpSeq</a> </span>)</span></span>)</span> <a href="group_1.html#K1">*</a> <span class="p1">(<span class="default"><a href="lopban_3.html#K2">Sum</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="lopban_4.html#K1" target="_self">ExpSeq</a> </span>)</span></span>)</span>
<b>by </b><i><a class="txt" href="lopban_4.html#E1:50"><i><font color="Green">E49</font></i></a>, <a class="txt" href="lopban_4.html#E45"><i><font color="Green">Lemma45</font></i></a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="lopban_4.html#K10" target="_self">exp</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="group_1.html#K1">*</a> <span class="p1">(<span class="default"><a href="lopban_3.html#K2">Sum</a> <span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="lopban_4.html#K1" target="_self">ExpSeq</a> </span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="lopban_4.html#T34" target="_self">Th34</a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="lopban_4.html#K10" target="_self">exp</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="group_1.html#K1">*</a> <span class="p1">(<span class="default"><a href="lopban_4.html#K10" target="_self">exp</a> <font color="Maroon">c<sub>2</sub></font></span>)</span>
<b>by </b><i><a class="ref" href="lopban_4.html#T34" target="_self">Th34</a></i>
;<br/>
<b>hence </b><a NAME="E4:50"/>
(  <a href="lopban_4.html#K10" target="_self">exp</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="rlvect_1.html#K4">+</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><a href="lopban_4.html#K10" target="_self">exp</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="group_1.html#K1">*</a> <span class="p1">(<span class="default"><a href="lopban_4.html#K10" target="_self">exp</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> &amp;  <a href="lopban_4.html#K10" target="_self">exp</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="rlvect_1.html#K4">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><a href="lopban_4.html#K10" target="_self">exp</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="group_1.html#K1">*</a> <span class="p1">(<span class="default"><a href="lopban_4.html#K10" target="_self">exp</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> &amp;  <a href="lopban_4.html#K10" target="_self">exp</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="rlvect_1.html#K4">+</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="lopban_4.html#K10" target="_self">exp</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="rlvect_1.html#K4">+</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> &amp;  <a href="lopban_4.html#K10" target="_self">exp</a> <font color="Maroon">c<sub>2</sub></font>, <a href="lopban_4.html#K10" target="_self">exp</a> <font color="Maroon">c<sub>3</sub></font> <a href="lopban_4.html#R1" target="_self">are_commutative</a>  )
 <b>by </b><i><a class="txt" href="lopban_4.html#E2:50"><i><font color="Green">E50</font></i></a>, <a class="ref" href="lopban_4.html#D1" target="_self">Def1</a></i>;<br/>


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