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

Zher2() Sub Zher2 ( Uplo As  String, N As  Long, Alpha As  Complex, X_I As  Complex, Y_I As  Complex, A_IJ As  Complex, LdA As  Long, Optional IncX As  Long = 1, Optional IncY As  Long = 1  ) Rank 2 operation: A <- αxyH + conjg(α)yxH + A (Hermitian matrices) (BLAS 2) Purpose This routine performs the Hermitian rank 2 operation A <- αxy^H + conjg(α)yx^H + A where α is a scalar, x and y are n element vectors and A is an n x n Hermitian matrix. Parameters [in] Uplo Specifies whether the upper or lower triangular part of the array A() is to be referenced as follows: = "U": Only the upper triangular part of A() is to be referenced. = "L": Only the lower triangular part of A() is to be referenced. [in] N Order of the matrix A. (N >= 0) (If N = 0, returns without computation) [in] Alpha Scalar α. [in] X_I An element X(I) of the array X(). Starting from this location, vector x is stored with element spacing IncX. [in] Y_I An element Y(I) of the array Y(). Starting from this location, vector y is stored with element spacing IncY. [in,out] A_IJ An element A(I, J) of the array A(). [in] Starting from this location, N x N Hermitian matrix A is stored. According to Uplo, only upper or lower triangular part is to be referenced. The imaginary parts of the diagonal elements need not be set and are assumed to be zero. [out] Starting from this location, N x N Hermitian matrix αxy^H + conjg(α)yx^H + A is stored. According to Uplo, only upper or lower triangular part is overwritten. The imaginary parts of the diagonal elements are set to zero. [in] LdA Leading dimension of the two dimensional array A(). (LdA >= max(1, N)) [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