performs one of the matrix-vector operations y := alpha*A*x + beta*y, or y := alpha*A *x + beta*y, where alpha and beta are scalars, x and y are vectors and A is an m by n matrix-performs one of the matrix-vector operati ons y : = alpha * A * x * y

着重介绍了矩阵的运算，包括矩阵的加减、乘除、转置和共轭、元素操作和逻辑运算等。-Focuses on the matrix operation, including matrix addition and subtraction, multiplication and division, transpose and conjugate, element operations and logical operations.