/usr/include/dolfin/la/EigenLUSolver.h is in libdolfin-dev 2017.2.0.post0-2.
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 99 100 101 102 103 104 105 106 107 108 | // Copyright (C) 2015 Chris Richardson
//
// 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/>.
#ifndef __DOLFIN_EIGEN_LU_SOLVER_H
#define __DOLFIN_EIGEN_LU_SOLVER_H
#include <map>
#include <memory>
#include <dolfin/common/types.h>
#include <Eigen/Dense>
#include "GenericLinearSolver.h"
namespace dolfin
{
/// Forward declarations
class EigenMatrix;
class EigenVector;
class GenericLinearOperator;
class GenericVector;
/// This class implements the direct solution (LU factorization) for
/// linear systems of the form Ax = b.
class EigenLUSolver : public GenericLinearSolver
{
public:
/// Constructor
EigenLUSolver(std::string method="default");
/// Constructor
EigenLUSolver(std::shared_ptr<const EigenMatrix> A,
std::string method="default");
/// Destructor
~EigenLUSolver();
/// Set operator (matrix)
void set_operator(std::shared_ptr<const GenericLinearOperator> A);
/// Set operator (matrix)
void set_operator(std::shared_ptr<const EigenMatrix> A);
/// Get operator (matrix)
const GenericLinearOperator& get_operator() const;
/// 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);
/// Solve linear system Ax = b
std::size_t solve(const EigenMatrix& A, EigenVector& x,
const EigenVector& b);
/// Return informal string representation (pretty-print)
std::string str(bool verbose) const;
/// Return a list of available solver methods
static std::map<std::string, std::string> methods();
/// Default parameter values
static Parameters default_parameters();
/// Return parameter type: "krylov_solver" or "lu_solver"
std::string parameter_type() const
{ return "lu_solver"; }
private:
// Call generic solve
template <typename Solver>
void call_solver(Solver& solver, GenericVector& x, const GenericVector& b);
// Available LU solvers and descriptions
static const std::map<std::string, std::string> _methods_descr;
// Current selected method
std::string _method;
// Select LU solver type
std::string select_solver(const std::string method) const;
// Operator (the matrix)
std::shared_ptr<const EigenMatrix> _matA;
};
}
#endif
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