SUBROUTINE DPBTRF( UPLO, N, NDIAG, A, LDA, INFO) CHARACTER * 1 UPLO INTEGER N, NDIAG, LDA, INFO DOUBLE PRECISION A(LDA,*) SUBROUTINE DPBTRF_64( UPLO, N, NDIAG, A, LDA, INFO) CHARACTER * 1 UPLO INTEGER*8 N, NDIAG, LDA, INFO DOUBLE PRECISION A(LDA,*)
SUBROUTINE PBTRF( UPLO, [N], NDIAG, A, [LDA], [INFO]) CHARACTER(LEN=1) :: UPLO INTEGER :: N, NDIAG, LDA, INFO REAL(8), DIMENSION(:,:) :: A SUBROUTINE PBTRF_64( UPLO, [N], NDIAG, A, [LDA], [INFO]) CHARACTER(LEN=1) :: UPLO INTEGER(8) :: N, NDIAG, LDA, INFO REAL(8), DIMENSION(:,:) :: A
void dpbtrf(char uplo, int n, int ndiag, double *a, int lda, int *info);
void dpbtrf_64(char uplo, long n, long ndiag, double *a, long lda, long *info);
The factorization has the form
A = U**T * U, if UPLO = 'U', or A = L * L**T, if UPLO = 'L',
where U is an upper triangular matrix and L is lower triangular.
On exit, if INFO = 0, the triangular factor U or L from the Cholesky factorization A = U**T*U or A = L*L**T of the band matrix A, in the same storage format as A.