zpptri
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 computed by CPPTRF
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
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
#include <sunperf.h>
void zpptri(char uplo, int n, doublecomplex *a, int *info);
void zpptri_64(char uplo, long n, doublecomplex *a, long *info);
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
computed by CPPTRF.
-
* UPLO (input)
-
-
* N (input)
-
The order of the matrix A. N >= 0.
-
* A (input/output)
-
On entry, the triangular factor U or L from the Cholesky
factorization 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)
-