/usr/include/dolfin/la/KrylovSolver.h is in libdolfin1.3-dev 1.3.0+dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 | // Copyright (C) 2007-2009 Garth N. Wells
//
// This file is part of DOLFIN.
//
// DOLFIN 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.
//
// DOLFIN 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 License
// along with DOLFIN. If not, see <http://www.gnu.org/licenses/>.
//
// Modified by Ola Skavhaug, 2008.
// Modified by Anders Logg, 2008.
//
// First added: 2007-07-03
// Last changed: 2013-11-25
#ifndef __KRYLOV_SOLVER_H
#define __KRYLOV_SOLVER_H
#include <string>
#include <vector>
#include <boost/shared_ptr.hpp>
#include <boost/scoped_ptr.hpp>
#include "GenericLinearSolver.h"
namespace dolfin
{
class GenericLinearOperator;
class GenericVector;
class VectorSpaceBasis;
/// This class defines an interface for a Krylov solver. The
/// approproiate solver is chosen on the basis of the matrix/vector
/// type.
class KrylovSolver : public GenericLinearSolver
{
public:
/// Constructor
KrylovSolver(std::string method="default",
std::string preconditioner="default");
/// Constructor
KrylovSolver(boost::shared_ptr<const GenericLinearOperator> A,
std::string method="default",
std::string preconditioner="default");
/// Destructor
~KrylovSolver();
/// Set operator (matrix)
void set_operator(const boost::shared_ptr<const GenericLinearOperator> A);
/// Set operator (matrix) and preconditioner matrix
void set_operators(const boost::shared_ptr<const GenericLinearOperator> A,
const boost::shared_ptr<const GenericLinearOperator> P);
/// Set null space of the operator (matrix). This is used to solve
/// singular systems
void set_nullspace(const VectorSpaceBasis& nullspace);
/// Solve linear system Ax = b
std::size_t solve(GenericVector& x, const GenericVector& b);
/// Solve linear system Ax = b
std::size_t solve(const GenericLinearOperator& A,
GenericVector& x, const GenericVector& b);
/// Default parameter values
static Parameters default_parameters();
/// Update solver parameters (pass parameters down to wrapped implementation)
virtual void update_parameters(const Parameters& parameters)
{
this->parameters.update(parameters);
solver->parameters.update(parameters);
}
private:
// Initialize solver
void init(std::string method, std::string preconditioner);
// Solver
boost::shared_ptr<GenericLinearSolver> solver;
};
}
#endif
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