/usr/include/dolfin/nls/NonlinearProblem.h is in libdolfin1.0-dev 1.0.0-1.
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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 | // Copyright (C) 2005-2008 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 Anders Logg, 2008.
//
// First added: 2005-10-24
// Last changed: 2011-01-14
#ifndef __NONLINEAR_PROBLEM_H
#define __NONLINEAR_PROBLEM_H
namespace dolfin
{
// Forward declarations
class GenericMatrix;
class GenericVector;
/// This is a base class for nonlinear problems which can return the
/// nonlinear function F(u) and its Jacobian J = dF(u)/du.
class NonlinearProblem
{
public:
/// Constructor
NonlinearProblem() {}
/// Destructor
virtual ~NonlinearProblem() {};
/// Function called by Newton solver before requesting F or J.
/// This can be used to compute F and J together
virtual void form(GenericMatrix& A, GenericVector& b, const GenericVector& x)
{ /* Do nothing if not supplied by the user */ };
/// Compute F at current point x
virtual void F(GenericVector& b, const GenericVector& x) = 0;
/// Compute J = F' at current point x
virtual void J(GenericMatrix& A, const GenericVector& x) = 0;
};
}
#endif
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