1, containing relation

Square matrix is actually a special kind of matrix.

When the number of rows of a matrix is equal to the number of columns, we can call it a square matrix.

2. A square matrix belongs to a matrix.

Square matrix belongs to matrix, which is a special matrix with the same number of rows and columns.

Extended data:

Definition of matrix

A table with m rows and n columns arranged according to m × n numbers aij is called m rows and n columns matrix, or m × n matrix for short. Write down:

This number of m×n is called the element of matrix A, which is called element for short. The number aij is located in the I-th row and the J-th column of matrix A, which is called the (I, j) element of matrix A. A matrix with the number aij as the (I, j) element can be denoted as (aij) or (aij)m × n, and the m × n matrix A is also denoted as Amn.

Matrix is a common tool in applied mathematics such as advanced algebra and statistical analysis. In physics, matrices have applications in circuit science, mechanics, optics and quantum physics. In computer science, three-dimensional animation also needs matrix.

References:

Baidu Encyclopedia-Matrix