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IRIX 6.2 Development Libraries
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CGBDI.z
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CGBDI
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1996-03-14
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2KB
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67 lines
CCCCGGGGBBBBDDDDIIII((((3333FFFF)))) CCCCGGGGBBBBDDDDIIII((((3333FFFF))))
NNNNAAAAMMMMEEEE
CGBDI - CGBDI computes the determinant of a band matrix using the
factors computed by CGBCO or CGBFA. If the inverse is needed, use CGBSL
N times.
SSSSYYYYNNNNOOOOPPPPSSSSYYYYSSSS
SUBROUTINE CGBDI(ABD,LDA,N,ML,MU,IPVT,DET)
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
On Entry
AAAABBBBDDDD COMPLEX(LDA, N)
the output from CGBCo or CGBFA.
LLLLDDDDAAAA INTEGER
the leading dimension of the array ABD .
NNNN INTEGER
the order of the original matrix.
MMMMLLLL INTEGER
number of diagonals below the main diagonal.
MMMMUUUU INTEGER
number of diagonals above the main diagonal.
IIIIPPPPVVVVTTTT INTEGER(N)
the pivot vector from CGBCO or CGBFA. On Return
DDDDEEEETTTT COMPLEX(2)
determinant of original matrix.
Determinant = DET(1) * 10.0**DET(2)
with 1.0 .LE. CABS1(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,AIMAG,CMPLX,REAL
PPPPaaaaggggeeee 1111