zpbdi

NAME

zpbdi - (obsolete) compute the determinant of a symmetric positive definite matrix A in banded storage, which has been Cholesky-factored by CPBCO or CPBFA.

SYNOPSIS

  SUBROUTINE ZPBDI( A, LDA, N, NDIAG, DET)
  DOUBLE COMPLEX A(LDA,*)
  INTEGER LDA, N, NDIAG
  DOUBLE PRECISION DET(*)
 
  SUBROUTINE ZPBDI_64( A, LDA, N, NDIAG, DET)
  DOUBLE COMPLEX A(LDA,*)
  INTEGER*8 LDA, N, NDIAG
  DOUBLE PRECISION DET(*)

C INTERFACE

#include <sunperf.h>

void zpbdi(doublecomplex *a, int lda, int n, int ndiag, double *det);

void zpbdi_64(doublecomplex *a, long lda, long n, long ndiag, double *det);

ARGUMENTS

* A (input): Cholesky factorization of the matrix A, as computed by CPBCO or CPBFA.
* LDA (input): Leading dimension of the array A as specified in a dimension or type statement. LDA >= NDIAG + 1.
* N (input): Order of the original matrix A. N >= 0.
* NDIAG (input): Number of diagonals. N-1 >= NDIAG >= 0 but if N = 0 then NDIAG = 0.
* DET (output): On exit, the determinant of the matrix A. The determinant is stored as b * (10 ** expon) where b is stored in DET(1) and expon is stored in DET(2). 1.0 <= |DET(1)| <= 10.0 or DET(1) = 0.0.