zgbmv zgemv zgerc zgeru zhbmv zhemv zher zher2 zhpmv zhpr zhpr2 zsbmv zspmv zspr zspr2 zsymv zsyr zsyr2 ztbmv ztbsv ztpmv ztpsv ztrmv ztrsv

zgemv() void zgemv ( char  trans, int  m, int  n, doublecomplex  alpha, int  lda, doublecomplex  a[], doublecomplex  x[], int  incx, doublecomplex  beta, doublecomplex  y[], int  incy  ) y <- αAx + βy, y <- αATx + βy or y <- αAHx + βy (complex matrices) (BLAS 2) Purpose This routine performs one of the matrix-vector operations y <- alpha*A*x + beta*y, y <- alpha*A^T*x + beta*y or y <- alpha*A^H*x + beta*y where alpha and beta are scalars, x and y are vectors and A is an m x n matrix. Parameters [in] trans Specifies the operation to be performed as follows: = 'N': y <- alpha*A*x + beta*y. = 'T': y <- alpha*A^T*x + beta*y. = 'C': y <- alpha*A^H*x + beta*y. [in] m Number of rows of the matrix A. (m >= 0) (If m = 0, returns without computation) [in] n Number of columns of the matrix A. (n >= 0) (If n = 0, returns without computation) [in] alpha Scalar alpha. [in] lda Leading dimension of the two dimensional array a[][] (lda >= max(1, m)) [in] a[][] Array a[la][lda] (la >= n) m x n matrix A. [in] x[] Array x[lx] (lx >= 1 + (n - 1)*abs(incx) if trans = 'N', lx >= 1 + (m - 1)*abs(incx) otherwise) Input vector x. [in] incx Storage spacing between elements of x. (incx != 0) [in] beta Scalar beta. When beta is supplied as zero then y[] need not be set on input. [in,out] y[] Array y[ly] (ly >= 1 + (m - 1)*abs(incy) if trans = 'N', ly >= 1 + (n - 1)*abs(incy) otherwise) [in] Input vector y. [out] Output vector. (= alpha*A*x + beta*y, alpha*A^T*x + beta*y or alpha*A^H*x + beta*y) [in] incy Storage spacing between elements of y. (incy != 0) Reference BLAS