cgesc2.f(3)

NAME
cgesc2.f -

SYNOPSIS

  Functions/Subroutines

subroutine cgesc2 (N, A, LDA, RHS, IPIV, JPIV, SCALE)
CGESC2 solves a system of linear equations using the LU factorization with complete pivoting computed by sgetc2.

Function/Subroutine Documentation

  subroutine cgesc2 (integerN, complex, dimension( lda, * )A, integerLDA, complex, dimension( * )RHS, integer, dimension( * )IPIV, integer, dimension( * )JPIV, realSCALE)

CGESC2 solves a system of linear equations using the LU factorization with complete pivoting computed by sgetc2.

Purpose:

     CGESC2 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 CGETC2.

Parameters:
    N

              N is INTEGER
              The number of columns of the matrix A.

    A

              A is COMPLEX array, dimension (LDA, N)
              On entry, the  LU part of the factorization of the n-by-n
              matrix A computed by CGETC2:  A = P * L * U * Q

    LDA

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

    RHS

              RHS is COMPLEX 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 REAL
               On exit, SCALE contains the scale factor. SCALE is chosen
               0 <= SCALE <= 1 to prevent owerflow in the solution.

Author:
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Date:
    September 2012

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

Definition at line 116 of file cgesc2.f.

Author

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