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

zspmv() void zspmv ( char  uplo, int  n, doublecomplex  alpha, doublecomplex  ap[], doublecomplex  x[], int  incx, doublecomplex  beta, doublecomplex  y[], int  incy  ) y <- αAx + βy (complex symmetric matrices in packed form) (BLAS 2) Purpose This routine performs the matrix-vector operation y <- alpha*A*x + beta*y, where alpha and beta are scalars, x and y are vectors and A is an n x n symmetric matrix, supplied in packed form. Parameters [in] uplo Specifies whether the upper or lower triangular part of the matrix A is supplied in the packed array ap[] as follows: = 'U': The upper triangular part of A is supplied in ap[] = 'L': The lower triangular part of A is supplied in ap[] [in] n Order of the matrix A. (n >= 0) (If n = 0, returns without computation) [in] alpha Scalar alpha. [in] ap[] Array ap[lap] (lap >= n(n + 1)/2) n x n symmetric matrix A in packed form. (Only upper or lower triangular part is stored) [in] x[] Array x[lx] (lx >= 1 + (n - 1)*abs(incx)) 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 + (n - 1)*abs(incy)) [in] Input vector y. [out] Output vector. (= alpha*A*x + beta*y) [in] incy Storage spacing between elements of y. (incy != 0) Reference BLAS