Zgbmv Zgemv Zgerc Zgeru Zhbmv Zhemv Zher Zher2 Zhpmv Zhpr Zhpr2 Zsbmv Zspmv Zspr Zspr2 Zsymv Zsyr Zsyr2 Ztbmv Ztbsv Ztpmv Ztpsv Ztrmv Ztrsv

Zsbmv() Sub Zsbmv ( Uplo As  String, N As  Long, K As  Long, Alpha As  Complex, Ab_IJ As  Complex, LdAb As  Long, X_I As  Complex, Beta As  Complex, Y_I As  Complex, Optional IncX As  Long = 1, Optional IncY As  Long = 1  ) y <- αAx + βy (complex symmetric band matrices) (BLAS 2) Purpose This routine performs the matrix-vector operation y <- αAx + βy where α and β are scalars, x and y are vectors and A is an n x n symmetric band matrix, with k super/sub-diagonals. Parameters [in] Uplo Specifies whether the upper or lower triangular part of the band matrix A is being supplied as follows: = "U": The upper triangular part of A is being supplied. = "L": The lower triangular part of A is being supplied. [in] N Order of the matrix A. (N >= 0) (If N = 0, returns without computation) [in] K Number of super/sub-diagonals of the matrix A. (K >= 0) [in] Alpha Scalar α. [in] Ab_IJ An element Ab(I, J) of the array Ab(). Starting from this location, N x N symmetric band matrix A is stored in symmetric band matrix form (K+1 x N). Only the upper or lower triangular part is stored. [in] LdAb Leading dimension of the two dimensional array Ab(). (LdAb >= K + 1) [in] X_I An element X(I) of the array X(). Starting from this location, N vector x is stored with element spacing IncX. [in] Beta Scalar β. When β is supplied as zero then y need not be set on input. [in,out] Y_I An element Y(I) of the array Y(). [in] Starting from this location, N vector y is stored with element spacing IncY. [out] Starting from this location, N vector αAx+βy is stored with element spacing IncY. [in] IncX (Optional) Element spacing of vector x in the array X(). (IncX <> 0) (default = 1) [in] IncY (Optional) Element spacing of vector y in the array Y(). (IncY <> 0) (default = 1) Reference BLAS