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- CCCCSSSSIIIIDDDDIIII((((3333FFFF)))) CCCCSSSSIIIIDDDDIIII((((3333FFFF))))
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- NNNNAAAAMMMMEEEE
- CSIDI - CSIDI computes the determinant and inverse of a complex
- symmetric matrix using the factors from CSIFA.
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- SSSSYYYYNNNNOOOOPPPPSSSSYYYYSSSS
- SUBROUTINE CSIDI(A,LDA,N,KPVT,DET,WORK,JOB)
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- On Entry
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- AAAA COMPLEX(LDA,N)
- the output from CSIFA.
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- LLLLDDDDAAAA INTEGER
- the leading dimension of the array A .
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- NNNN INTEGER
- the order of the matrix A . KVPT INTEGER(N)
- the pivot vector from CSIFA.
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- WWWWOOOORRRRKKKK COMPLEX(N)
- work vector. Contents destroyed.
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- JJJJOOOOBBBB 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.
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- AAAA contains the upper triangle of the inverse of
- the original matrix. The strict lower triangle
- is never referenced.
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- DDDDEEEETTTT 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
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- AAAA 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
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- PPPPaaaaggggeeee 1111
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