cpbdi
cpbdi - (obsolete) compute the determinant of a symmetric positive definite matrix A in
banded storage, which has been Cholesky-factored by CPBCO or CPBFA.
SUBROUTINE CPBDI( A, LDA, N, NDIAG, DET)
COMPLEX A(LDA,*)
INTEGER LDA, N, NDIAG
REAL DET(*)
SUBROUTINE CPBDI_64( A, LDA, N, NDIAG, DET)
COMPLEX A(LDA,*)
INTEGER*8 LDA, N, NDIAG
REAL DET(*)
#include <sunperf.h>
void cpbdi(complex *a, int lda, int n, int ndiag, float *det);
void cpbdi_64(complex *a, long lda, long n, long ndiag, float *det);
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* A (input)
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Cholesky factorization of the matrix A, as computed by CPBCO or CPBFA.
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* LDA (input)
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Leading dimension of the array A as specified in a dimension or type statement. LDA >= NDIAG + 1.
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* N (input)
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Order of the original matrix A. N >= 0.
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* NDIAG (input)
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Number of diagonals. N-1 >= NDIAG >= 0 but if N = 0 then NDIAG = 0.
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* DET (output)
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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.