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
/*
Copyright (C) 2011 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 "fmpz.h"
void
fmpz_lcm(fmpz_t f, const fmpz_t g, const fmpz_t h)
{
fmpz_t t;
if (fmpz_is_zero(g) || fmpz_is_zero(h))
{
fmpz_zero(f);
return;
}
if (fmpz_is_pm1(g))
{
fmpz_abs(f, h);
return;
}
if (fmpz_is_pm1(h))
{
fmpz_abs(f, g);
return;
}
fmpz_init(t);
fmpz_gcd(t, g, h);
fmpz_divexact(t, g, t);
fmpz_mul(f, t, h);
fmpz_abs(f, f);
fmpz_clear(t);
}