It is usually represented the matrices by *capital letters* and its elements by *small letters*, accompanied by *two indexes* which indicate, respectively, the row and the column that the element occupies. So an array **THE** of type m x n is represented by:

or abbreviated A = a_{ij}_{m x n}, on what** i** and **j **represent, respectively, the row and column that the element occupies. For example, in the previous matrix, **The**_{23} is the element of the 2nd row and 3rd column.

In the matrix we have:

Or in matrix B = -1 0 2 5, we have:

The_{11 }= -1

The_{12} = 0

The_{13} = 2

The_{14} = 5