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anderson.hh
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/*
* SPDX-License-Indentifier: AGPL-3.0-or-later
*
* Copyright (©) 2016-2024 EPFL (École Polytechnique Fédérale de Lausanne),
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
* Copyright (©) 2020-2024 Lucas Frérot
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef ANDERSON_HH
#define ANDERSON_HH
/* -------------------------------------------------------------------------- */
#include "epic.hh"
#include <deque>
/* -------------------------------------------------------------------------- */
namespace tamaas {
class AndersonMixing : public EPICSolver {
using memory_t = std::deque<GridBase<Real>>;
public:
AndersonMixing(ContactSolver& csolver, EPSolver& epsolver,
Real tolerance = 1e-10, UInt memory = 5);
Real solve(const std::vector<Real>& load) override;
private:
static std::vector<Real> computeGamma(const memory_t& residual);
static GridBase<Real> mixingUpdate(GridBase<Real> x, std::vector<Real> gamma,
const memory_t& memory,
const memory_t& residual_memory,
Real relaxation);
private:
UInt M;
};
} // namespace tamaas
/* -------------------------------------------------------------------------- */
#endif

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