DGBDI(3F)DGBDI(3F)NAMEDGBDI - DGBDI computes the determinant of a band matrix using the
factors computed by DGBCO or DGBFA. If the inverse is needed, use DGBSL
N times.
SYNOPSYS
SUBROUTINE DGBDI(ABD,LDA,N,ML,MU,IPVT,DET)
DESCRIPTION
On Entry
ABD DOUBLE PRECISION(LDA, N)
the output from DGBCO or DGBFA.
LDA INTEGER
the leading dimension of the array ABD .
N INTEGER
the order of the original matrix.
ML INTEGER
number of diagonals below the main diagonal.
MU INTEGER
number of diagonals above the main diagonal.
IPVT INTEGER(N)
the pivot vector from DGBCO or DGBFA. On Return
DET DOUBLE PRECISION(2)
determinant of original matrix.
Determinant = DET(1) * 10.0**DET(2)
with 1.0 .LE. DABS(DET(1)) .LT. 10.0
or DET(1) = 0.0 . LINPACK. This version dated 08/14/78 . Cleve
Moler, University of New Mexico, Argonne National Lab. Subroutines and
Functions Fortran DABS
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