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<b>consider </b><font color="Maroon" title="c3">M</font> being   <a href="matrix_1.html#NM7" title="MATRIX_1:NM.7">Diagonal</a> of <font color="Maroon" title="c1">n</font>,<font color="Maroon" title="c2">K</font>;<br/>
<b>take </b>
<font color="Maroon" title="c3">M</font>
;<br/>

<b>thus </b><a NAME="E2:15_1_1"/>
( <font color="Maroon" title="c3">M</font> is <a href="matrix_2.html#V2" title="MATRIX_2:attr.2">lower_triangular</a> &amp; <font color="Maroon" title="c3">M</font> is <a href="matrix_2.html#V1" title="MATRIX_2:attr.1">upper_triangular</a> )
 ;<br/>


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