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Mathemaitcs
A matrix is a rectangular array of numbers. The numbers may be real or complex. We represent it as

where *a _{ij} *represents the element at the intersection of

In case the order of a matrix is established or known then we shall simply write

A = [a_{ij}] of type m×n

A matrix with *m *rows and *n *columns is called *m *_ *n *matrix and dimension (or size) of this matrix is said to be *m *_ *n.*