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

zspr2() void zspr2 ( char  uplo, int  n, doublecomplex  alpha, doublecomplex  x[], int  incx, doublecomplex  y[], int  incy, doublecomplex  ap[]  ) Rank 2 operation: A <- αxyT + αyxT + A (complex symmetric matrices in packed form) (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 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] 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,out] ap[] Array ap[lap] (lap >= n(n + 1)/2) [in] n x n symmetric matrix A in packed form. (Upper or lower triangle) [out] Output matrix in packed form. (= alpha*x*y^T + alpha*y*x^T + A) (Upper or lower triangle) Reference BLAS