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/*
* vim: ts=4 sw=4 et tw=0 wm=0
*
* libcola - A library providing force-directed network layout using the
* stress-majorization method subject to separation constraints.
*
* Copyright (C) 2006-2008 Monash University
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* See the file LICENSE.LGPL distributed with the library.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
*/
#ifndef _CONJUGATE_GRADIENT_H
#define _CONJUGATE_GRADIENT_H
#include <valarray>
double
inner(std::valarray<double> const &x,
std::valarray<double> const &y);
void
conjugate_gradient(std::valarray<double> const &A,
std::valarray<double> &x,
std::valarray<double> const &b,
unsigned const n, double const tol,
unsigned const max_iterations);
#endif // _CONJUGATE_GRADIENT_H
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