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
/*
Copyright (C) 2018 arbguest
This file is part of FLINT.
FLINT is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "perm.h"
#include "arb_mat.h"
int
arb_mat_approx_solve(arb_mat_t X, const arb_mat_t A, const arb_mat_t B, slong prec)
{
int result;
slong n, m, *perm;
arb_mat_t LU;
n = arb_mat_nrows(A);
m = arb_mat_ncols(X);
if (n == 0 || m == 0)
return 1;
perm = _perm_init(n);
arb_mat_init(LU, n, n);
result = arb_mat_approx_lu(perm, LU, A, prec);
if (result)
arb_mat_approx_solve_lu_precomp(X, perm, LU, B, prec);
arb_mat_clear(LU);
_perm_clear(perm);
return result;
}