57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
/*=============================================================================
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This file is part of FLINT.
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FLINT 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; either version 2 of the License, or
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(at your option) any later version.
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FLINT 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 FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2010 Fredrik Johansson
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******************************************************************************/
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#include "fmpz_mat.h"
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#include "perm.h"
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int
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fmpz_mat_solve_fflu(fmpz_mat_t X, fmpz_t den,
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const fmpz_mat_t A, const fmpz_mat_t B)
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{
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fmpz_mat_t LU;
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slong dim, *perm;
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int result;
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if (fmpz_mat_is_empty(A) || fmpz_mat_is_empty(B))
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{
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fmpz_one(den);
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return 1;
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}
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dim = fmpz_mat_nrows(A);
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perm = _perm_init(dim);
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fmpz_mat_init_set(LU, A);
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result = (fmpz_mat_fflu(LU, den, perm, LU, 1) == dim);
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if (result)
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fmpz_mat_solve_fflu_precomp(X, perm, LU, B);
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else
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fmpz_zero(den);
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_perm_clear(perm);
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fmpz_mat_clear(LU);
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return result;
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}
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