Optimisation

Abstract

An m × n matrix is a rectangular array of numbers with m rows and n columns and is usually written in the form

$$ \left( {\begin{array}{*{20}{l}} {{a_{11}}}&{{a_{12}}}& \cdots &{{a_{1n}}} \\ {{a_{21}}}&{{a_{22}}}& \cdots &{{a_{2n}}} \\ \vdots & \vdots &{}& \vdots \\ {{a_{m1}}}&{{a_{m2}}}& \cdots &{{a_{mn}}} \end{array}} \right) $$

If m = n the matrix is called square.