mirror of
https://github.com/vale981/arb
synced 2025-03-05 09:21:38 -05:00
33 lines
741 B
C
33 lines
741 B
C
/*
|
|
Copyright (C) 2014 Fredrik Johansson
|
|
|
|
This file is part of Arb.
|
|
|
|
Arb 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 2.1 of the License, or
|
|
(at your option) any later version. See <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "acb_modular.h"
|
|
|
|
int
|
|
psl2z_is_correct(const psl2z_t g)
|
|
{
|
|
int res;
|
|
fmpz_t t;
|
|
|
|
if (fmpz_sgn(&g->c) < 0)
|
|
return 0;
|
|
|
|
if (fmpz_is_zero(&g->c) && fmpz_sgn(&g->d) <= 0)
|
|
return 0;
|
|
|
|
fmpz_init(t);
|
|
fmpz_mul(t, &g->a, &g->d);
|
|
fmpz_submul(t, &g->b, &g->c);
|
|
res = fmpz_is_one(t);
|
|
fmpz_clear(t);
|
|
return res;
|
|
}
|
|
|