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

Zsyr() Sub Zsyr ( Uplo As  String, N As  Long, Alpha As  Complex, X_I As  Complex, A_IJ As  Complex, LdA As  Long, Optional IncX As  Long = 1  ) Rank 1 operation: A <- αxxT + A (complex symmetric matrices) (BLAS 2) Purpose This routine performs the symmetric rank 1 operation A <- αxx^T + A where α is a complex scalar, x is an n element vector and A is an n x n symmetric 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,out] A_IJ An element A(I, J) of the array A(). [in] Starting from this location, N x N symmetric matrix A is stored. According to Uplo, only upper or lower triangular part is to be referenced. [out] Starting from this location, N x N Hermitian matrix αxx^H + A is stored. According to Uplo, only upper or lower triangular part is overwritten. [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) Reference BLAS