CSIDI(3F)

NAME
     CSIDI   - CSIDI computes the determinant and inverse of a complex
     symmetric matrix using the factors from CSIFA.


SYNOPSYS
      SUBROUTINE CSIDI(A,LDA,N,KPVT,DET,WORK,JOB)

DESCRIPTION
     On Entry

     A COMPLEX(LDA,N)
        the output from CSIFA.

     LDA INTEGER
        the leading dimension of the array A .

     N INTEGER
        the order of the matrix A .  KVPT    INTEGER(N)
        the pivot vector from CSIFA.

     WORK COMPLEX(N)
        work vector.  Contents destroyed.

     JOB INTEGER
        JOB has the decimal expansion  AB  where
        If  B .NE. 0, the inverse is computed,
        If  A .NE. 0, the determinant is computed,
        For example, JOB = 11  gives both.  On Return Variables not requested
     by JOB are not used.

     A contains the upper triangle of the inverse of
        the original matrix.  The strict lower triangle
        is never referenced.

     DET COMPLEX(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.  Error Condition

     A division by zero may occur if the inverse is requested and  CSICO  has
     set RCOND .EQ. 0.0 or  CSIFA  has set  INFO .NE. 0 .  LINPACK.  This
     version dated 08/14/78 .  James Bunch, Univ. Calif. San Diego, Argonne
     Nat. Lab.  Subroutines and Functions BLAS CAXPY,CCOPY,CDOTU,CSWAP Fortran
     ABS,CMPLX,IABS,MOD,REAL