/usr/include/dolfin/la/ITLKrylovSolver.h is in libdolfin1.0-dev 1.0.0-1.
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) 2008-2009 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 Dag Lindbo 2008
// Modified by Anders Logg 2008-2011
//
// First added: 2008-07-16
// Last changed: 2011-10-19
#ifdef HAS_MTL4
#ifndef __ITL_KRYLOV_SOLVER_H
#define __ITL_KRYLOV_SOLVER_H
#include <boost/shared_ptr.hpp>
#include <dolfin/common/types.h>
#include "GenericLinearSolver.h"
namespace dolfin
{
/// Forward declarations
class GenericMatrix;
class GenericVector;
class MTL4Matrix;
class MTL4Vector;
/// This class implements Krylov methods for linear systems
/// of the form Ax = b. It is a wrapper for the Krylov solvers
/// of ITL.
class ITLKrylovSolver : public GenericLinearSolver
{
public:
/// Create Krylov solver for a particular method and preconditioner
ITLKrylovSolver(std::string method = "default",
std::string preconditioner = "default");
/// Destructor
~ITLKrylovSolver();
/// Set operator (matrix)
void set_operator(const boost::shared_ptr<const GenericMatrix> A);
/// Set operator (matrix) and preconditioner matrix
void set_operators(const boost::shared_ptr<const GenericMatrix> A,
const boost::shared_ptr<const GenericMatrix> P);
/// Get operator (matrix)
const GenericMatrix& get_operator() const;
/// Solve linear system Ax = b and return number of iterations
uint solve(GenericVector& x, const GenericVector& b);
/// Solve linear system Ax = b and return number of iterations
uint solve(MTL4Vector& x, const MTL4Vector& b);
/// Solve linear system Ax = b and return number of iterations
uint solve(const GenericMatrix& A, GenericVector& x, const GenericVector& b);
/// Return informal string representation (pretty-print)
std::string str(bool verbose) const;
/// Return a list of available methods
static std::vector<std::pair<std::string, std::string> > methods();
/// Return a list available preconditioners
static std::vector<std::pair<std::string, std::string> > preconditioners();
/// Default parameter values
static Parameters default_parameters();
private:
/// Operator (the matrix) as MTL4Matrix
boost::shared_ptr<const MTL4Matrix> A;
/// Matrix used to construct the preconditoner
boost::shared_ptr<const MTL4Matrix> P;
// Solver type
std::string method;
// Preconditioner type
std::string preconditioner;
};
}
#endif
#endif
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