Introduction | Matrices

A matrix (plural matrices) is a rectangular array or table of numbers, symbols, or expressions. These numbers are arranged in rows and columns as shown below,

A = $\begin{bmatrix}a_{11} & a_{12} & … & a_{1n}\\
a_{21} & a_{22} & … & a_{2n}\\
… & … & … & …\\
a_{m1} & a_{m2} & … & a_{mn}
\end{bmatrix}$

Here $a_{11}$, $a_{12}$ … can be numbers, symbols, or expressions. We call them “elements of the matrix”.