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<a NAME="E1:47_2_1"/>
(  <a href="finseq_1.html#K3">len</a> <span class="p1">(<span class="default"><a href="matrix_1.html#K7" target="_self">Col</a> <font color="Maroon">M</font>,<font color="Maroon">i</font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="finseq_1.html#K3">len</a> <font color="Maroon">M</font> &amp;  <a href="matrix_1.html#K7" target="_self">Col</a> <font color="Maroon">M</font>,<font color="Maroon">i</font> is    <a href="finseq_2.html#M2">Element</a> of <font color="Maroon">D</font> <a href="finseq_2.html#K3">*</a>  )
 
<b>by </b><i>, <a class="ref" href="finseq_1.html#D11">FINSEQ_1:def 11</a></i>;<br/>
<a NAME="E2:47_2_1"/><b>then </b>
 <a href="matrix_1.html#K7" target="_self">Col</a> <font color="Maroon">M</font>,<font color="Maroon">i</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <font color="Olive">p</font> where <font color="Olive">p</font> is    <a href="finseq_2.html#M2">Element</a> of <font color="Maroon">D</font> <a href="finseq_2.html#K3">*</a>  :  <a href="finseq_1.html#K3">len</a> <font color="Olive">p</font> <a href="hidden.html#R1">=</a>  <a href="finseq_1.html#K3">len</a> <font color="Maroon">M</font> </span>}</span> 
 
;<br/>
<b>hence </b><a NAME="E3:47_2_1"/>
 <a href="matrix_1.html#K7" target="_self">Col</a> <font color="Maroon">M</font>,<font color="Maroon">i</font> is    <a href="finseq_2.html#M2">Element</a> of <span class="p1">(<span class="default"><a href="finseq_1.html#K3">len</a> <font color="Maroon">M</font></span>)</span> <a href="finseq_2.html#K4">-tuples_on</a> <font color="Maroon">D</font>
 ;<br/>


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