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<b>let </b><font color="Maroon">K</font> be  non <a href="struct_0.html#V3">empty</a> <a href="group_1.html#V4">associative</a> <a href="group_1.html#V7">commutative</a> <a href="vectsp_1.html#V8">left_unital</a>  <a href="vectsp_1.html#L3">doubleLoopStr</a> ;<br/><b>let </b><font color="Maroon">a1</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">K</font>;<br/><b>let </b><font color="Maroon">a2</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">K</font>;<br/><b>let </b><font color="Maroon">a3</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">K</font>;<br/>







<b>thus </b> <a href="group_4.html#K3">Product</a> <span class="p1"><a href="rlvect_1.html#K8">&lt;*</a><span class="default"><font color="Maroon">a1</font>,<font color="Maroon">a2</font>,<font color="Maroon">a3</font></span><a href="rlvect_1.html#K8">*&gt;</a></span> = 
 <a href="group_4.html#K3">Product</a> <span class="p1">(<span class="default"><span class="p2"><a href="rlvect_1.html#K7">&lt;*</a><span class="default"><font color="Maroon">a1</font>,<font color="Maroon">a2</font></span><a href="rlvect_1.html#K7">*&gt;</a></span> <a href="finseq_1.html#K8">^</a> <span class="p2"><a href="matrix_2.html#K4">&lt;*</a><span class="default"><font color="Maroon">a3</font></span><a href="matrix_2.html#K4">*&gt;</a></span></span>)</span>
<b>by </b><i><a class="ref" href="finseq_1.html#T60">FINSEQ_1:60</a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="group_4.html#K3">Product</a> <span class="p2"><a href="rlvect_1.html#K7">&lt;*</a><span class="default"><font color="Maroon">a1</font>,<font color="Maroon">a2</font></span><a href="rlvect_1.html#K7">*&gt;</a></span></span>)</span> <a href="group_1.html#K10">*</a> <font color="Maroon">a3</font>
<b>by </b><i/>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon">a1</font> <a href="group_1.html#K10">*</a> <font color="Maroon">a2</font></span>)</span> <a href="group_1.html#K10">*</a> <font color="Maroon">a3</font>
<b>by </b><i><a class="ref" href="fvsum_1.html#T17" target="_self">Th17</a></i>
;<br/>


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