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.

Schematic depiction of the matrix product AB of two matrices A and B.

The vectors represented by a 2-by-2 matrix correspond to the sides of a unit square transformed into a parallelogram.

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.

$\begin{bmatrix}1 & 9 & -13 \\20 & 5 & -6 \end{bmatrix}$

单词	Principal submatrix
释义	Principal submatrix 英语百科 Matrix (mathematics) 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. $\begin{bmatrix}1 & 9 & -13 \\20 & 5 & -6 \end{bmatrix}$
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Principal submatrix

Matrix (mathematics)