The square matrix is called a diagonal matrix.

该方矩阵称为对角矩阵。

For this to make sense, we need a must be a square matrix.

要让这个有意义，我们要使a是一个方阵。

On one continent, thousands of people line in square matrix, rushing ahead to kill.

在一块大陆上，上万的人排成方阵，彼此冲杀。

In this note, a necessary and sufficient condition of diagonalization for square matrix is considering.

方阵是否可以对角化，是矩阵的一条很重要的性质。

The study of sign stability of a real square matrix has important applications in various areas such as economics, ecology, and so on.

一个实矩阵的符号稳定性问题在经济学、生态学等诸多领域中都有应用背景。