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<font color="Maroon">n</font> <a href="hidden.html#R2">in</a>  <a href="numbers.html#K5">NAT</a> 
 
<b>by </b><i><a class="ref" href="ordinal1.html#D13">ORDINAL1:def 13</a></i>;<br/>
<b>hence </b><a NAME="E2:45_1_1"/>
<font color="Maroon">M</font> <a href="matrix_1.html#K4" target="_self">@</a>  is   <a href="matrix_1.html#NM3">Matrix</a> of <font color="Maroon">n</font>,<font color="Maroon">D</font>
 <b>by </b><i/>;<br/>


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