pqc/external/flint-2.4.3/nmod_poly_mat/test/t-det.c
2014-05-24 23:16:06 +02:00

111 lines
3.2 KiB
C

/*=============================================================================
This file is part of FLINT.
FLINT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FLINT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FLINT; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2011 Fredrik Johansson
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include "flint.h"
#include "nmod_poly.h"
#include "nmod_poly_mat.h"
#include "fmpz.h"
int
main(void)
{
slong i;
FLINT_TEST_INIT(state);
flint_printf("det....");
fflush(stdout);
for (i = 0; i < 100 * flint_test_multiplier(); i++)
{
nmod_poly_mat_t A, B, C;
nmod_poly_t a, b, ab, c;
slong n, deg;
mp_limb_t mod;
float density;
mod = n_randtest_prime(state, 0);
n = n_randint(state, 10);
deg = 1 + n_randint(state, 5);
density = n_randint(state, 100) * 0.01;
nmod_poly_mat_init(A, n, n, mod);
nmod_poly_mat_init(B, n, n, mod);
nmod_poly_mat_init(C, n, n, mod);
nmod_poly_init(a, mod);
nmod_poly_init(b, mod);
nmod_poly_init(ab, mod);
nmod_poly_init(c, mod);
nmod_poly_mat_randtest_sparse(A, state, deg, density);
nmod_poly_mat_randtest_sparse(B, state, deg, density);
nmod_poly_mat_mul(C, A, B);
nmod_poly_mat_det(a, A);
nmod_poly_mat_det(b, B);
nmod_poly_mat_det(c, C);
nmod_poly_mul(ab, a, b);
if (!nmod_poly_equal(c, ab))
{
flint_printf("FAIL:\n");
flint_printf("determinants don't agree!\n");
flint_printf("A:\n");
nmod_poly_mat_print(A, "x");
flint_printf("B:\n");
nmod_poly_mat_print(B, "x");
flint_printf("C:\n");
nmod_poly_mat_print(C, "x");
flint_printf("det(A):\n");
nmod_poly_print(a);
flint_printf("\ndet(B):\n");
nmod_poly_print(b);
flint_printf("\ndet(C):\n");
nmod_poly_print(c);
flint_printf("\ndet(A)*det(B):\n");
nmod_poly_print(ab);
flint_printf("\n");
abort();
}
nmod_poly_clear(a);
nmod_poly_clear(b);
nmod_poly_clear(ab);
nmod_poly_clear(c);
nmod_poly_mat_clear(A);
nmod_poly_mat_clear(B);
nmod_poly_mat_clear(C);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}