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- CCCCGGGGBBBBSSSSLLLL((((3333FFFF)))) CCCCGGGGBBBBSSSSLLLL((((3333FFFF))))
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- NNNNAAAAMMMMEEEE
- CGBSL - CGBSL solves the complex band system A * X = B or CTRANS(A) *
- X = B using the factors computed by CGBCO or CGBFA.
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- SSSSYYYYNNNNOOOOPPPPSSSSYYYYSSSS
- SUBROUTINE CGBSL(ABD,LDA,N,ML,MU,IPVT,B,JOB)
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- On Entry
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- AAAABBBBDDDD COMPLEX(LDA, N)
- the output from CGBCo or CGBFA.
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- LLLLDDDDAAAA INTEGER
- the leading dimension of the array ABD .
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- NNNN INTEGER
- the order of the original matrix.
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- MMMMLLLL INTEGER
- number of diagonals below the main diagonal.
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- MMMMUUUU INTEGER
- number of diagonals above the main diagonal.
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- IIIIPPPPVVVVTTTT INTEGER(N)
- the pivot vector from CGBCO or CGBFA.
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- BBBB COMPLEX(N)
- the right hand side vector.
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- JJJJOOOOBBBB INTEGER
- = 0 to solve A*X = B ,
- = nonzero to solve CTRANS(A)*X = B , where
- CTRANS(A) is the conjugate transpose. On Return
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- BBBB the solution vector X . Error Condition
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- AAAA division by zero will occur if the input factor contains a zero on the
- diagonal. Technically this indicates singularity but it is often caused
- by improper arguments or improper setting of LDA . It will not occur if
- the subroutines are called correctly and if CGBCO has set RCOND .GT. 0.0
- or CGBFA has set INFO .EQ. 0 . To compute INVERSE(A) * C where C is
- a matrix with P columns
- CALL CGBCO(ABD,LDA,N,ML,MU,IPVT,RCOND,Z)
- IF (RCOND is too small) GO TO ...
- DO 10 J = 1, P
- CALL CGBSL(ABD,LDA,N,ML,MU,IPVT,C(1,J),0) 10 CONTINUE LINPACK. This
- version dated 08/14/78 . Cleve Moler, University of New Mexico, Argonne
- National Lab. Subroutines and Functions BLAS CAXPY,CDOTC Fortran
- CONJG,MIN0
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- PPPPaaaaggggeeee 1111
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