# Matrices

A matrix is every set of numbers or terms arranged in a rectangular shape, forming rows and columns.

Each number in a **matrix** is an **element**. One element is distinguished from another by its position, that is to say, the row and column to which it belongs.

The number of rows and columns of a matrix is called the **dimension of a matrix**. Thus, a matrix is of dimension: 2x4, 3x2, 2x5,... If the matrix has the same number of rows and columns, is said to be of order: 2, 3, ...

The set of matrices of * m* rows and

*columns is denoted by*

**n****A**or

_{mxn}**(a**, and any element within the matrix is in row

_{ij})*in column*

**i***, for*

**j****a**.

_{ij}Two matrices are equal when they have the same dimension and equal elements which occupy the same place in both.

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