/usr/include/dolfin/function/SubSpace.h is in libdolfin-dev 1.4.0+dfsg-4.
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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) 2008 Anders Logg
//
// 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/>.
//
// First added: 2008-11-03
// Last changed: 2008-11-03
#ifndef __SUB_SPACE_H
#define __SUB_SPACE_H
#include <vector>
#include "FunctionSpace.h"
namespace dolfin
{
/// This class represents a subspace (component) of a function space.
///
/// The subspace is specified by an array of indices. For example,
/// the array [3, 0, 2] specifies subspace 2 of subspace 0 of
/// subspace 3.
///
/// A typical example is the function space W = V x P for Stokes.
/// Here, V = W[0] is the subspace for the velocity component and
/// P = W[1] is the subspace for the pressure component. Furthermore,
/// W[0][0] = V[0] is the first component of the velocity space etc.
class SubSpace : public FunctionSpace
{
public:
/// Create subspace for given component (one level)
SubSpace(const FunctionSpace& V,
std::size_t component);
/// Create subspace for given component (two levels)
SubSpace(const FunctionSpace& V,
std::size_t component, std::size_t sub_component);
/// Create subspace for given component (n levels)
SubSpace(const FunctionSpace& V,
const std::vector<std::size_t>& component);
};
}
#endif
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