DPBDI(3F)

DPBDI - DPBDI computes the determinant of a double precision symmetric positive definite band matrix using the factors computed by DPBCO or DPBFA. If the inverse is needed, use DPBSL N times.

As shipped in IRIX 6.5. First release of IRIX 6.5.

NAME
     DPBDI   - DPBDI computes the determinant of a double precision symmetric
     positive definite band matrix using the factors computed by DPBCO or
     DPBFA.  If the inverse is needed, use DPBSL  N  times.


SYNOPSYS
      SUBROUTINE DPBDI(ABD,LDA,N,M,DET)

DESCRIPTION
     On Entry

     ABD DOUBLE PRECISION(LDA, N)
        the output from DPBCO or DPBFA.

     LDA INTEGER
        the leading dimension of the array  ABD .

     N INTEGER
        the order of the matrix  A .

     M INTEGER
        the number of diagonals above the main diagonal.  On Return

     DET DOUBLE PRECISION(2)
        determinant of original matrix in the form
        DETERMINANT = DET(1) * 10.0**DET(2)
        with  1.0 .LE. DET(1) .LT. 10.0
        or  DET(1) .EQ. 0.0 .  LINPACK.  This version dated 08/14/78 .  Cleve
     Moler, University of New Mexico, Argonne National Lab.