SGBDI(3F)							     SGBDI(3F)

NAME    [Toc]    [Back]

     SGBDI   - SGBDI computes the determinant of a band	matrix using the
     factors computed by SBGCO or SGBFA.  If the inverse is needed, use	SGBSL
     N	times.

SYNOPSYS    [Toc]    [Back]

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

DESCRIPTION    [Toc]    [Back]

     On	Entry

     ABD REAL(LDA, N)
	the output from	SBGCO or SGBFA.

     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 SBGCO or SGBFA.  On Return

     DET REAL(2)
	determinant of original	matrix.
	Determinant = DET(1) * 10.0**DET(2)
	with  1.0 .LE. ABS(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 ABS


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