/usr/include/dolfin/la/EpetraKrylovSolver.h is in libdolfin-dev 1.4.0+dfsg-4.
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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 2008-2011
// Modified by Garth N. Wells 2009
//
// First added: 2008
// Last changed: 2011-10-19
#ifdef HAS_TRILINOS
#ifndef __EPETRA_KRYLOV_SOLVER_H
#define __EPETRA_KRYLOV_SOLVER_H
#include <map>
#include <memory>
#include <string>
#include <dolfin/common/NoDeleter.h>
#include <dolfin/common/types.h>
#include "GenericLinearSolver.h"
namespace dolfin
{
// Forward declarations
class GenericLinearOperator;
class GenericVector;
class EpetraMatrix;
class EpetraVector;
class EpetraLinearOperator;
class EpetraUserPreconditioner;
class TrilinosPreconditioner;
/// This class implements Krylov methods for linear systems of the
/// form Ax = b. It is a wrapper for the Krylov solvers of Epetra.
class EpetraKrylovSolver : public GenericLinearSolver
{
public:
/// Create Krylov solver for a particular method and
/// preconditioner
EpetraKrylovSolver(std::string method = "default",
std::string preconditioner = "default");
/// Create Krylov solver for a particular method and
/// TrilinosPreconditioner
EpetraKrylovSolver(std::string method,
TrilinosPreconditioner& preconditioner);
/// Destructor
~EpetraKrylovSolver();
/// Set the operator (matrix)
void set_operator(std::shared_ptr<const GenericLinearOperator> A);
/// Set the operator (matrix)
void set_operators(std::shared_ptr<const GenericLinearOperator> A,
std::shared_ptr<const GenericLinearOperator> P);
/// Get the operator (matrix)
const GenericLinearOperator& get_operator() const;
/// Solve linear system Ax = b and return number of iterations
std::size_t solve(GenericVector& x, const GenericVector& b);
/// Solve linear system Ax = b and return number of iterations
std::size_t solve(EpetraVector& x, const EpetraVector& b);
/// Solve linear system Ax = b and return number of iterations
std::size_t solve(const GenericLinearOperator& A, GenericVector& x,
const GenericVector& b);
/// Solve linear system Ax = b and return number of iterations
std::size_t solve(const EpetraMatrix& A, EpetraVector& x,
const EpetraVector& b);
/// Return residual from most recent solve
double residual(const std::string residualtype) const;
/// Return a list of available solver methods
static std::vector<std::pair<std::string, std::string> > methods();
/// Return a list of available preconditioners
static std::vector<std::pair<std::string, std::string> > preconditioners();
/// Default parameter values
static Parameters default_parameters();
/// Return informal string representation (pretty-print)
std::string str(bool verbose) const;
private:
// Solver type
std::string _method;
// Available solvers
static const std::map<std::string, std::string> _methods;
// Available solvers descriptions
static const std::vector<std::pair<std::string, std::string> >
_methods_descr;
// Operator (the matrix)
std::shared_ptr<const EpetraMatrix> _matA;
// Matrix used to construct the preconditoner
std::shared_ptr<const EpetraMatrix> _matP;
// Preconditioner
std::shared_ptr<TrilinosPreconditioner> _preconditioner;
// Residuals
double _relative_residual;
double _absolute_residual;
};
}
#endif
#endif
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