Question 1: Do you use parentheses or braces for the matrix during the postgraduate entrance examination? Ask for standardized writing! You cannot use the vertical bar || curly braces {}, but you can use () and [] at the same time.

Question 2: Are matrix brackets square brackets or parentheses? Hello, they are square brackets. 、

Mathematically, a matrix is a complex number or real number *** [1] arranged in a rectangular array, which originates from a square matrix composed of coefficients and constants of an equation. This concept was first put forward by British mathematician Kelly in19th century.

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. Matrix operation is an important problem in the field of numerical analysis. Decomposition of a matrix into a combination of simple matrices can simplify the operation of the matrix in theory and practical application. For some widely used and special matrices, such as sparse matrix and quasi-diagonal matrix, there are concrete fast operation algorithms. For the development and application of matrix related theory, please refer to matrix theory. Infinite-dimensional matrices will also appear in astrophysics, quantum mechanics and other fields, which is the generalization of matrices.

Question 3: When writing a matrix, when do you use brackets and when do you use square brackets? Brackets are used for general vectors and square brackets for two-dimensional matrices.

Question 4: It doesn't matter whether the box of the matrix is parentheses or brackets. But pay attention to two points:

1. Don't write vertical lines.

2. In another expression, such as one-dimensional vector, two-dimensional matrix/two-dimensional tensor composed of multiple one-dimensional vectors, etc. , brackets, brackets, braces are ok.

Question 5: How to use word documents as brackets in the matrix? Perform menu insert-object, find Microsoft Formula 3.0, and then click OK. A formula editor will appear. First, select the first one in the second row ("fence template" will be displayed when the mouse points up), then select the last one in the second row (matrix template), and finally enter the elements of each matrix in each small box!