zpptri - compute the inverse of a complex Hermitian positive definite matrix A using the Cholesky factorization A = U**H*U or A = L*L**H com- puted by ZPPTRF
SUBROUTINE ZPPTRI(UPLO, N, A, INFO) CHARACTER*1 UPLO DOUBLE COMPLEX A(*) INTEGER N, INFO SUBROUTINE ZPPTRI_64(UPLO, N, A, INFO) CHARACTER*1 UPLO DOUBLE COMPLEX A(*) INTEGER*8 N, INFO F95 INTERFACE SUBROUTINE PPTRI(UPLO, N, A, INFO) CHARACTER(LEN=1) :: UPLO COMPLEX(8), DIMENSION(:) :: A INTEGER :: N, INFO SUBROUTINE PPTRI_64(UPLO, N, A, INFO) CHARACTER(LEN=1) :: UPLO COMPLEX(8), DIMENSION(:) :: A INTEGER(8) :: N, INFO C INTERFACE #include <sunperf.h> void zpptri(char uplo, int n, doublecomplex *a, int *info); void zpptri_64(char uplo, long n, doublecomplex *a, long *info);
Oracle Solaris Studio Performance Library zpptri(3P) NAME zpptri - compute the inverse of a complex Hermitian positive definite matrix A using the Cholesky factorization A = U**H*U or A = L*L**H com- puted by ZPPTRF SYNOPSIS SUBROUTINE ZPPTRI(UPLO, N, A, INFO) CHARACTER*1 UPLO DOUBLE COMPLEX A(*) INTEGER N, INFO SUBROUTINE ZPPTRI_64(UPLO, N, A, INFO) CHARACTER*1 UPLO DOUBLE COMPLEX A(*) INTEGER*8 N, INFO F95 INTERFACE SUBROUTINE PPTRI(UPLO, N, A, INFO) CHARACTER(LEN=1) :: UPLO COMPLEX(8), DIMENSION(:) :: A INTEGER :: N, INFO SUBROUTINE PPTRI_64(UPLO, N, A, INFO) CHARACTER(LEN=1) :: UPLO COMPLEX(8), DIMENSION(:) :: A INTEGER(8) :: N, INFO C INTERFACE #include <sunperf.h> void zpptri(char uplo, int n, doublecomplex *a, int *info); void zpptri_64(char uplo, long n, doublecomplex *a, long *info); PURPOSE zpptri computes the inverse of a complex Hermitian positive definite matrix A using the Cholesky factorization A = U**H*U or A = L*L**H com- puted by ZPPTRF. ARGUMENTS UPLO (input) = 'U': Upper triangular factor is stored in A; = 'L': Lower triangular factor is stored in A. N (input) The order of the matrix A. N >= 0. A (input/output) COMPLEX*16 array, dimension (N*(N+1)/2) On entry, the triangular factor U or L from the Cholesky fac- torization A = U**H*U or A = L*L**H, packed columnwise as a linear array. The j-th column of U or L is stored in the array A as follows: if UPLO = 'U', A(i + (j-1)*j/2) = U(i,j) for 1<=i<=j; if UPLO = 'L', A(i + (j-1)*(2n-j)/2) = L(i,j) for j<=i<=n. On exit, the upper or lower triangle of the (Hermitian) inverse of A, overwriting the input factor U or L. INFO (output) = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value > 0: if INFO = i, the (i,i) element of the factor U or L is zero, and the inverse could not be computed. 7 Nov 2015 zpptri(3P)