Matrix (mathematics)
![Each element of a matrix is often denoted by a variable with two subscripts. For instance, a2,1 represents the element at the second row and first column of a matrix A.](/Images/godic/202502/04/Matrix.svg4744.png")
![Schematic depiction of the matrix product AB of two matrices A and B.](/Images/godic/202502/04/Matrix_multiplication_diagram_2.svg4744.png")
![The vectors represented by a 2-by-2 matrix correspond to the sides of a unit square transformed into a parallelogram.](/Images/godic/202502/04/Area_parallellogram_as_determinant.svg4744.png")
![](/Images/godic/202502/04/Squeeze_r=1.5.svg4744.png")
In mathematics, a matrix (plural matrices) is a rectangular array of numbers, symbols, or expressions, arranged in rows and columns. The dimensions of matrix (1) are 2 × 3 (read "two by three"), because there are two rows and three columns.
![\begin{bmatrix}1 & 9 & -13 \\20 & 5 & -6 \end{bmatrix}](/Images/godic/202502/04/3a3ea6a8dbb8c76c7fbbf5352a23281e4744.png")