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

zhpr() void zhpr ( char  uplo, int  n, double  alpha, doublecomplex  x[], int  incx, doublecomplex  ap[]  ) Rank 1 operation: A <- αxxH + A (Hermitian matrices in packed form) (BLAS 2) Purpose This routine performs the Hermitian rank 1 operation A <- alpha*x*x^H + A where alpha is a real scalar, x is an n element vector and A is an n x n Hermitian matrix, supplied in packed form. 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,out] ap[] Array ap[lap] (lap >= n(n + 1)/2) [in] n x n Hermitian matrix A in packed form. According to uplo, upper or lower triangular part is to be supplied. The imaginary parts of the diagonal elements need not be set and are assumed to be zero. [out] Output matrix in packed form (= alpha*x*x^H + A). According to uplo, upper or lower triangular part is supplied. The imaginary parts of the diagonal elements are set to zero. Reference BLAS