zpocon zpotrf zpotri zpotrs zppcon zpptrf zpptri zpptrs

zpotri() void zpotri ( char  uplo, int  n, int  lda, doublecomplex  a[], int *  info  ) Inverse of a Hermitian positive definite matrix Purpose This routine computes the inverse of a Hermitian positive definite matrix A using the Cholesky factorization A = U^H*U or A = L*L^H computed by zpotrf. Parameters [in] uplo = 'U': Upper triangular factor U is stored in a[][]. = 'L': Lower triangular factor L is stored in a[][]. [in] n Order of the matrix A. (n >= 0) (If n = 0, returns without computation) [in] lda Leading dimension of the two dimensional array a[][]. (lda >= max(1, n)) [in,out] a[][] Array a[la][lda] (la >= n) [in] The triangular factor U or L from the Cholesky factorization A = U^H*U or A = L*L^H, as computed by zpotrf. [out] If info = 0, the upper or lower triangle of the (Hermitian) inverse of A, overwriting the input factor U or L. [out] info = 0: Successful exit = -1: The argument uplo had an illegal value (uplo != 'U' nor 'L') = -2: The argument n had an illegal value (n < 0) = -3: The argument lda had an illegal value (lda < max(1, n)) = i > 0: The i-th diagonal element of the factor U or L is zero, and the inverse could not be computed. Reference LAPACK