/usr/include/rheolef/ldlt_seq_builtin.h is in librheolef-dev 6.7-6.
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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 | #ifndef _RHEOLEF_LDLT_SEQ_BUILTIN_H
#define _RHEOLEF_LDLT_SEQ_BUILTIN_H
///
/// This file is part of Rheolef.
///
/// Copyright (C) 2000-2009 Pierre Saramito <Pierre.Saramito@imag.fr>
///
/// Rheolef is free software; you can redistribute it and/or modify
/// it under the terms of the GNU General Public License as published by
/// the Free Software Foundation; either version 2 of the License, or
/// (at your option) any later version.
///
/// Rheolef 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 General Public License for more details.
///
/// You should have received a copy of the GNU General Public License
/// along with Rheolef; if not, write to the Free Software
/// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
///
/// =========================================================================
// LDLt : factorization of symmetric matrix (sequential version)
// implementation: inspirated from the Tim Davis "LDLT" library
//
// author: Pierre.Saramito@imag.fr
//
// date: 15 september 2014
//
#include <valarray>
#include "rheolef/csr.h"
namespace rheolef {
template <typename T>
class ldlt_seq_builtin {
public:
ldlt_seq_builtin();
ldlt_seq_builtin(const csr_rep<T,sequential>& a);
void update_values (const csr_rep<T,sequential>& a);
bool is_singular() const { return !status; }
template<class M2>
vec<T,M2>& inplace_solve (vec<T,M2>& x) const;
template<class M2>
vec<T,M2> solve (const vec<T,M2>& b) const;
size_t nnz() const { return L.nnz(); }
size_t flops() const { return fp; }
template <typename U> friend
odiststream& operator<< (odiststream&, const ldlt_seq_builtin<U>&);
protected:
csr_rep<T,sequential> L;
vec<T,sequential> D;
std::valarray<size_t> perm;
bool status;
size_t fp;
};
} // namespace rheolef
#endif // _RHEOLEF_LDLT_SEQ_BUILTIN_H
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