/usr/include/openturns/Brent.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 Brent.hxx
* @brief Implementation class of the scalar nonlinear solver based on
*
* 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 2012-02-17 19:35:43 +0100 (Fri, 17 Feb 2012)
*/
#ifndef OPENTURNS_BRENT_HXX
#define OPENTURNS_BRENT_HXX
#include "OTprivate.hxx"
#include "SolverImplementation.hxx"
BEGIN_NAMESPACE_OPENTURNS
/*
* @class Brent
*
* This class is an interface for the 1D nonlinear solverImplementations
*/
class Brent : public SolverImplementation
{
CLASSNAME;
public:
/* Parameter constructor */
explicit Brent(const NumericalScalar absoluteError = ResourceMap::GetAsNumericalScalar( "SolverImplementation-DefaultAbsoluteError" ),
const NumericalScalar relativeError = ResourceMap::GetAsNumericalScalar( "SolverImplementation-DefaultRelativeError" ),
const NumericalScalar residualError = ResourceMap::GetAsNumericalScalar( "SolverImplementation-DefaultResidualError" ),
const UnsignedLong maximumFunctionEvaluation = ResourceMap::GetAsUnsignedLong( "SolverImplementation-DefaultMaximumFunctionEvaluation" ));
/* Copy constructor */
/* Virtual constructor */
virtual Brent * clone() const;
/* String converter */
String __repr__() const;
/* Solve attempt to find one root to the equation function(x) = value in [infPoint, supPoint] given function(infPoint) and function(supPoint) with the Brent method */
using SolverImplementation::solve;
NumericalScalar solve(const NumericalMathFunction & function,
const NumericalScalar value,
const NumericalScalar infPoint,
const NumericalScalar supPoint,
const NumericalScalar infValue,
const NumericalScalar supValue) const;
private:
}; /* Class Brent */
END_NAMESPACE_OPENTURNS
#endif /* OPENTURNS_BRENT_HXX */
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