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61 lines
1.6 KiB
61 lines
1.6 KiB
/*
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This file is part of qxx -- matrix algebra in exact arithmetic
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Copyright (C) 2013-2014 Laurent Poirrier
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libp is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, version 3 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with pxx. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef QXX_DENSE_LU_HPP
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#define QXX_DENSE_LU_HPP
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#include "rational.hpp"
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#include "dmat.hpp"
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// **************************************************************************
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//
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// **************************************************************************
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namespace q {
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// **************************************************************************
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//
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// **************************************************************************
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class dlu {
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public:
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dlu(const dmat &a);
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~dlu();
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dmat L() const;
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dmat U() const;
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dvec solve_Ax(const dvec &b) const;
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dvec solve_xA(const dvec &b) const;
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mpq det() const;
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private:
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void pivot(int k);
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void factorize(const dmat &a);
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int n;
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std::vector<int> row_bwd;
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dmat g;
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};
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// **************************************************************************
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//
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// **************************************************************************
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};
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#endif
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