# snbdi.f

          SUBROUTINE SNBDI (ABE, LDA, N, ML, MU, IPVT, DET)
    C***BEGIN PROLOGUE  SNBDI
    C***PURPOSE  Compute the determinant of a band matrix using the factors
    C            computed by SNBCO or SNBFA.
    C***LIBRARY   SLATEC
    C***CATEGORY  D3A2
    C***TYPE      SINGLE PRECISION (SNBDI-S, DNBDI-D, CNBDI-C)
    C***KEYWORDS  BANDED, DETERMINANT, LINEAR EQUATIONS, NONSYMMETRIC
    C***AUTHOR  Voorhees, E. A., (LANL)
    C***DESCRIPTION
    C
    C     SNBDI computes the determinant of a band matrix
    C     using the factors computed by SNBCO or SNBFA.
    C     If the inverse is needed, use SNBSL  N  times.
    C
    C     On Entry
    C
    C        ABE     REAL(LDA, NC)
    C                the output from SNBCO or SNBFA.
    C                NC must be .GE. 2*ML+MU+1 .
    C
    C        LDA     INTEGER
    C                the leading dimension of the array  ABE .
    C
    C        N       INTEGER
    C                the order of the original matrix.
    C
    C        ML      INTEGER
    C                number of diagonals below the main diagonal.
    C
    C        MU      INTEGER
    C                number of diagonals above the main diagonal.
    C
    C        IPVT    INTEGER(N)
    C                the pivot vector from SNBCO or SNBFA.
    C
    C     On Return
    C
    C        DET     REAL(2)
    C                determinant of original matrix.
    C                Determinant = DET(1) * 10.0**DET(2)
    C                with  1.0 .LE. ABS(DET(1)) .LT. 10.0
    C                or  DET(1) = 0.0 .
    C
    C***REFERENCES  J. J. Dongarra, J. R. Bunch, C. B. Moler, and G. W.
    C                 Stewart, LINPACK Users' Guide, SIAM, 1979.
    C***ROUTINES CALLED  (NONE)
    C***REVISION HISTORY  (YYMMDD)
    C   800725  DATE WRITTEN
    C   890831  Modified array declarations.  (WRB)
    C   890831  REVISION DATE from Version 3.2
    C   891214  Prologue converted to Version 4.0 format.  (BAB)
    C   920501  Reformatted the REFERENCES section.  (WRB)
    C***END PROLOGUE  SNBDI