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- DDDDSSSSIIIISSSSLLLL((((3333FFFF)))) DDDDSSSSIIIISSSSLLLL((((3333FFFF))))
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- NNNNAAAAMMMMEEEE
- DSISL - DSISL solves the double precision symmetric system A * X = B
- using the factors computed by DSIFA.
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- SSSSYYYYNNNNOOOOPPPPSSSSYYYYSSSS
- SUBROUTINE DSISL(A,LDA,N,KPVT,B)
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- On Entry
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- AAAA DOUBLE PRECISION(LDA,N)
- the output from DSIFA.
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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 .
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- KKKKPPPPVVVVTTTT INTEGER(N)
- the pivot vector from DSIFA.
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- BBBB DOUBLE PRECISION(N)
- the right hand side vector. On Return
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- BBBB the solution vector X . Error Condition
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- AAAA division by zero may occur if DSICO has set RCOND .EQ. 0.0 or DSIFA
- has set INFO .NE. 0 . To compute INVERSE(A) * C where C is a matrix
- with P columns
- CALL DSIFA(A,LDA,N,KPVT,INFO)
- IF (INFO .NE. 0) GO TO ...
- DO 10 J = 1, P
- CALL DSISL(A,LDA,N,KPVT,C(1,J)) 10 CONTINUE LINPACK. This version
- dated 08/14/78 . James Bunch, Univ. Calif. San Diego, Argonne Nat. Lab.
- Subroutines and Functions BLAS DAXPY,DDOT Fortran IABS
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- PPPPaaaaggggeeee 1111
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