SRC/dgesc2.f(3)

NAME
SRC/dgesc2.f

SYNOPSIS

  Functions/Subroutines
subroutine dgesc2 (n, a, lda, rhs, ipiv, jpiv, scale)
DGESC2 solves a system of linear equations using the LU factorization with complete pivoting computed by sgetc2.

Function/Subroutine Documentation

  subroutine dgesc2 (integer n, double precision, dimension( lda, * ) a, integer lda, double precision, dimension( * ) rhs, integer, dimension( * ) ipiv, integer, dimension( * ) jpiv, double precision scale)

DGESC2 solves a system of linear equations using the LU factorization with complete pivoting computed by sgetc2.

Purpose:

     DGESC2 solves a system of linear equations
               A * X = scale* RHS
     with a general N-by-N matrix A using the LU factorization with
     complete pivoting computed by DGETC2.

Parameters
    N

              N is INTEGER
              The order of the matrix A.

    A

              A is DOUBLE PRECISION array, dimension (LDA,N)
              On entry, the  LU part of the factorization of the n-by-n
              matrix A computed by DGETC2:  A = P * L * U * Q

    LDA

              LDA is INTEGER
              The leading dimension of the array A.  LDA >= max(1, N).

    RHS

              RHS is DOUBLE PRECISION array, dimension (N).
              On entry, the right hand side vector b.
              On exit, the solution vector X.

    IPIV

              IPIV is INTEGER array, dimension (N).
              The pivot indices; for 1 <= i <= N, row i of the
              matrix has been interchanged with row IPIV(i).

    JPIV

              JPIV is INTEGER array, dimension (N).
              The pivot indices; for 1 <= j <= N, column j of the
              matrix has been interchanged with column JPIV(j).

    SCALE

              SCALE is DOUBLE PRECISION
              On exit, SCALE contains the scale factor. SCALE is chosen
              0 <= SCALE <= 1 to prevent overflow in the solution.

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Contributors:
    Bo Kagstrom and Peter Poromaa, Department of Computing Science, Umea University, S-901 87 Umea, Sweden.

Definition at line 113 of file dgesc2.f.

Author

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