1. Different meanings: Matrix A is reversible, which means that there is a matrix B, so that AB=BA= identity matrix, A is called reversible matrix, and B is the inverse matrix of A. ..
Second, the expression is different: this proposition is false, and it can be overturned by an example. For example, both E and -E are reversible matrices, but E+(-E)=O, and the zero matrix is irreversible, so the proposition is wrong. The only example of multiplying an irreversible matrix by a reversible matrix is a zero matrix.
matrix
It is a common tool in applied mathematics disciplines 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.