DGBDI(3F)							     DGBDI(3F)

NAME    [Toc]    [Back]

     DGBDI   - 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    [Toc]    [Back]

      SUBROUTINE DGBDI(ABD,LDA,N,ML,MU,IPVT,DET)

DESCRIPTION    [Toc]    [Back]

     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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