org.netlib.lapack
Class Dgesc2

java.lang.Object
  org.netlib.lapack.Dgesc2

public class Dgesc2
extends java.lang.Object

Following is the description from the original
Fortran source.  For each array argument, the Java
version will include an integer offset parameter, so
the arguments may not match the description exactly.
Contact seymour@cs.utk.edu with any questions.


 *     ..
 *
 *  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.
 *
 *  Arguments
 *  =========
 *
 *  N       (input) INTEGER
 *          The order of the matrix A.
 *
 *  A       (input) 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     (input) INTEGER
 *          The leading dimension of the array A.  LDA >= max(1, N).
 *
 *  RHS     (input/output) DOUBLE PRECISION array, dimension (N).
 *          On entry, the right hand side vector b.
 *          On exit, the solution vector X.
 *
 *  IPIV    (iput) INTEGER array, dimension (N).
 *          The pivot indices; for 1 <= i <= N, row i of the
 *          matrix has been interchanged with row IPIV(i).
 *
 *  JPIV    (iput) INTEGER array, dimension (N).
 *          The pivot indices; for 1 <= j <= N, column j of the
 *          matrix has been interchanged with column JPIV(j).
 *
 *  SCALE    (output) DOUBLE PRECISION
 *           On exit, SCALE contains the scale factor. SCALE is chosen
 *           0 <= SCALE <= 1 to prevent owerflow in the solution.
 *
 *  Further Details
 *  ===============
 *
 *  Based on contributions by
 *     Bo Kagstrom and Peter Poromaa, Department of Computing Science,
 *     Umea University, S-901 87 Umea, Sweden.
 *
 *  =====================================================================
 *
 *     .. Parameters ..

Constructor Summary

Dgesc2()

Method Summary

static void

dgesc2(int n, double[] a, int _a_offset, int lda, double[] rhs, int _rhs_offset, int[] ipiv, int _ipiv_offset, int[] jpiv, int _jpiv_offset, doubleW scale)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Dgesc2

public Dgesc2()

Method Detail

dgesc2

public static void dgesc2(int n,
                          double[] a,
                          int _a_offset,
                          int lda,
                          double[] rhs,
                          int _rhs_offset,
                          int[] ipiv,
                          int _ipiv_offset,
                          int[] jpiv,
                          int _jpiv_offset,
                          doubleW scale)