1 /*
2     Copyright (C) 2010 Fredrik Johansson
3 
4     This file is part of FLINT.
5 
6     FLINT is free software: you can redistribute it and/or modify it under
7     the terms of the GNU Lesser General Public License (LGPL) as published
8     by the Free Software Foundation; either version 2.1 of the License, or
9     (at your option) any later version.  See <http://www.gnu.org/licenses/>.
10 */
11 
12 #include <stdlib.h>
13 #include "flint.h"
14 #include "fmpz.h"
15 #include "fmpz_poly.h"
16 #include "fmpz_poly_mat.h"
17 
18 
19 slong
fmpz_poly_mat_rank(const fmpz_poly_mat_t A)20 fmpz_poly_mat_rank(const fmpz_poly_mat_t A)
21 {
22     fmpz_poly_mat_t tmp;
23     fmpz_poly_t den;
24     slong rank;
25 
26     if (fmpz_poly_mat_is_empty(A))
27         return 0;
28 
29     fmpz_poly_mat_init_set(tmp, A);
30     fmpz_poly_init(den);
31     rank = fmpz_poly_mat_fflu(tmp, den, NULL, tmp, 0);
32     fmpz_poly_mat_clear(tmp);
33     fmpz_poly_clear(den);
34     return rank;
35 }
36