# Matrix

< MathGloss‎ | M

This glossary is far from complete. We are constantly adding math terms.
For instructions on adding new terms, please refer to Math Glossary Main Page

Definition
 Matrix A rectangular array of numbers in $m$ rows and $n$ columnss is called a matrix of order $m\times n$ If $A$ is a matrix of order $m\times n$ we write $A=(a_{i,j})_(m\times n)$

## Examples

$A=\begin{pmatrix} 1 & 3 &-4 \\ 0 & -1 & 5 \\ 3 & 4 & 8 \end{pmatrix}$ is a $3\times 3$ matrix

$B=\begin{pmatrix} 1 & 3 &-4 & 1 \\ 0 & -1 & 5 & 7 \\ 3 & 4 & 8 & 2 \end{pmatrix}$ is a $3\times 4$ matrix