/usr/include/openturns/RungeKutta.hxx is in libopenturns-dev 1.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* @file RungeKutta.hxx
* @brief This class implements the fourth order fixed-step Runge-Kutta ODE integrator
*
* Copyright (C) 2005-2013 EDF-EADS-Phimeca
*
* 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 3 of the License, or
* (at your option) any later version.
*
* 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. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* @author schueller
* @date 2010-11-09 13:44:00 +0100 (Tue, 09 Nov 2010)
*/
#ifndef OPENTURNS_RUNGEKUTTA_HXX
#define OPENTURNS_RUNGEKUTTA_HXX
#include "ODESolverImplementation.hxx"
BEGIN_NAMESPACE_OPENTURNS
/**
* @class RungeKutta
*
* Fourth order fixed-step Runge-Kutta ODE integrator
*/
class RungeKutta
: public ODESolverImplementation
{
CLASSNAME;
public:
/** Default constructor */
RungeKutta();
/** Parameter constructor */
RungeKutta(const DynamicalFunction & transitionFunction);
/** Virtual constructor */
RungeKutta * clone() const;
/** String converter */
virtual String __repr__() const;
/** Perform cross-validation */
NumericalSample solve(const NumericalPoint & initialState,
const NumericalPoint & timeGrid) const;
/** Method save() stores the object through the StorageManager */
void save(Advocate & adv) const;
/** Method load() reloads the object from the StorageManager */
void load(Advocate & adv);
private:
/** Perform one step of the RungeKutta method */
NumericalPoint computeStep(const NumericalScalar t,
const NumericalPoint & state,
const NumericalScalar h) const;
}; /* class RungeKutta */
END_NAMESPACE_OPENTURNS
#endif /* OPENTURNS_RUNGEKUTTA_HXX */
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