/usr/include/dolfin/la/test_nullspace.h is in libdolfin-dev 2016.2.0-2.
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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 | // Copyright (C) 2014 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/>.
#ifndef __TEST_NULLSPACE_H
#define __TEST_NULLSPACE_H
#include <string>
namespace dolfin
{
// Forward declarations
class GenericLinearOperator;
class VectorSpaceBasis;
/// Check whether a vector space basis is in the nullspace of a
/// given operator. The string option 'type' can be "right" for the
/// right nullspace (Ax=0) or "left" for the left nullspace (A^Tx =
/// 0). To test the left nullspace, A must also be of type
/// GenericMatrix.
bool in_nullspace(const GenericLinearOperator& A, const VectorSpaceBasis& x,
std::string type="right");
}
#endif
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