/usr/include/dolfin/la/EpetraLUSolver.h is in libdolfin-dev 1.4.0+dfsg-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// 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 Anders Logg 2011
//
// First added: 2008
// Last changed: 2011-10-19
#ifdef HAS_TRILINOS
#ifndef __EPETRA_LU_SOLVER_H
#define __EPETRA_LU_SOLVER_H
#include <memory>
#include "GenericLUSolver.h"
/// Forward declaration
class Amesos_BaseSolver;
class Epetra_LinearProblem;
namespace dolfin
{
/// Forward declarations
class GenericLinearOperator;
class GenericVector;
class EpetraMatrix;
class EpetraVector;
/// This class implements the direct solution (LU factorization) for
/// linear systems of the form Ax = b. It is a wrapper for the LU
/// solver of Epetra.
class EpetraLUSolver : public GenericLUSolver
{
public:
/// Constructor
EpetraLUSolver(std::string method="default");
/// Constructor
EpetraLUSolver(std::shared_ptr<const GenericLinearOperator> A,
std::string method="default");
/// Destructor
~EpetraLUSolver();
/// Set operator (matrix)
void set_operator(std::shared_ptr<const GenericLinearOperator> 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 EpetraMatrix& A, EpetraVector& x,
const EpetraVector& b);
/// Solve linear system A^Tx = b
std::size_t solve_transpose(GenericVector& x, const GenericVector& b);
/// Solve linear system A^Tx = b
std::size_t solve_transpose(const GenericLinearOperator& A,
GenericVector& x, const GenericVector& b);
/// Solve linear system A^Tx = b
std::size_t solve_transpose(const EpetraMatrix& A, EpetraVector& x,
const EpetraVector& b);
/// Return a list of available solver methods
static std::vector<std::pair<std::string, std::string> > methods();
/// Default parameter values
static Parameters default_parameters();
/// Return informal string representation (pretty-print)
std::string str(bool verbose) const;
private:
// Choose method / solver package
std::string choose_method(std::string method) const;
bool symbolic_factorized, numeric_factorized;
// Operator (the matrix)
std::shared_ptr<const EpetraMatrix> _matA;
// Epetra linear problem
std::unique_ptr<Epetra_LinearProblem> linear_problem;
// Linear solver
std::unique_ptr<Amesos_BaseSolver> solver;
// Solver method
std::string _method;
};
}
#endif
#endif
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