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) 2020 Fredrik Johansson
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 "ca_mat.h"
truth_t
ca_mat_nonsingular_solve_adjugate(ca_mat_t X, const ca_mat_t A, const ca_mat_t B, ca_ctx_t ctx)
{
truth_t result;
ca_t det;
ca_mat_t T;
ca_init(det, ctx);
ca_mat_init(T, ca_mat_nrows(A), ca_mat_ncols(A), ctx);
ca_mat_adjugate(T, det, A, ctx);
result = ca_check_is_zero(det, ctx);
if (result == T_TRUE)
result = T_FALSE;
else if (result == T_FALSE)
result = T_TRUE;
if (result == T_TRUE)
{
ca_mat_mul(X, T, B, ctx);
ca_mat_div_ca(X, X, det, ctx);
}
ca_mat_clear(T, ctx);
ca_clear(det, ctx);
return result;
}