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

zsyr2() void zsyr2 ( char  uplo, int  n, doublecomplex  alpha, doublecomplex  x[], int  incx, doublecomplex  y[], int  incy, int  lda, doublecomplex  a[]  ) Rank 2 operation: A <- αxyT + αyxT + A (complex symmetric matrices) (BLAS 2) Purpose This routine performs the rank 2 operation A <- alpha*x*y^T + alpha*y*x^T + A where alpha is a scalar, x and y are n element vectors 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 alpha. [in] x[] Array x[lx] (lx >= 1 + (n - 1)*abs(incx)) Vector x. [in] incx Storage spacing between elements of x. (incx != 0) [in] y[] Array y[ly] (ly >= 1 + (n - 1)*abs(incy)) Vector y. [in] incy Storage spacing between elements of y. (incy != 0) [in] lda Leading dimension of the two dimensional array a[][]. (lda >= max(1, n)) [in,out] a[][] Array a[la][lda] (la >= n) [in] n x n symmetric matrix A. (Only upper or lower triangular part is to be referenced) [out] Output matrix. (= alpha*x*y^T + alpha*y*x^T + A) (Only upper or lower triangular part is to be referenced) Reference BLAS