127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2009 William Hart
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Copyright (C) 2010 Sebastian Pancratz
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******************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <gmp.h>
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#include "flint.h"
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#include "fmpz.h"
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#include "fmpz_poly.h"
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#include "ulong_extras.h"
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int
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main(void)
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{
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int i, result;
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FLINT_TEST_INIT(state);
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flint_printf("resultant....");
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fflush(stdout);
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/* Just one specific test */
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{
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fmpz_poly_t f, g;
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fmpz_t a, b;
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fmpz_poly_init(f);
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fmpz_poly_init(g);
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fmpz_init(a);
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fmpz_init(b);
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fmpz_poly_set_str(f, "11 -15 -2 -2 17 0 0 6 0 -5 1 -1");
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fmpz_poly_set_str(g, "9 2 1 1 1 1 1 0 -1 -2");
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fmpz_poly_resultant(a, f, g);
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fmpz_set_str(b, "-44081924855067", 10);
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result = (fmpz_equal(a, b));
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if (!result)
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{
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flint_printf("FAIL:\n");
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flint_printf("f = "), fmpz_poly_print(f), flint_printf("\n\n");
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flint_printf("g = "), fmpz_poly_print(g), flint_printf("\n\n");
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flint_printf("res(f, h) = "), fmpz_print(a), flint_printf("\n\n");
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abort();
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}
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fmpz_poly_clear(f);
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fmpz_poly_clear(g);
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fmpz_clear(a);
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fmpz_clear(b);
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}
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/* Check that R(fg, h) = R(f, h) R(g, h) */
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for (i = 0; i < 100 * flint_test_multiplier(); i++)
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{
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fmpz_t a, b, c, d;
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fmpz_poly_t f, g, h, p;
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fmpz_init(a);
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fmpz_init(b);
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fmpz_init(c);
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fmpz_init(d);
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fmpz_poly_init(f);
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fmpz_poly_init(g);
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fmpz_poly_init(h);
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fmpz_poly_init(p);
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fmpz_poly_randtest(f, state, n_randint(state, 50), 100);
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fmpz_poly_randtest(g, state, n_randint(state, 50), 100);
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fmpz_poly_randtest(h, state, n_randint(state, 10), 100);
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fmpz_poly_resultant(a, f, h);
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fmpz_poly_resultant(b, g, h);
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fmpz_mul(c, a, b);
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fmpz_poly_mul(p, f, g);
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fmpz_poly_resultant(d, p, h);
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result = (fmpz_equal(c, d));
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if (!result)
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{
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flint_printf("FAIL:\n");
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flint_printf("f = "), fmpz_poly_print(f), flint_printf("\n\n");
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flint_printf("g = "), fmpz_poly_print(g), flint_printf("\n\n");
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flint_printf("h = "), fmpz_poly_print(h), flint_printf("\n\n");
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flint_printf("res(f, h) = "), fmpz_print(a), flint_printf("\n\n");
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flint_printf("res(g, h) = "), fmpz_print(b), flint_printf("\n\n");
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flint_printf("res(fg, h) = "), fmpz_print(d), flint_printf("\n\n");
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abort();
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}
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fmpz_clear(a);
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fmpz_clear(b);
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fmpz_clear(c);
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fmpz_clear(d);
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fmpz_poly_clear(f);
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fmpz_poly_clear(g);
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fmpz_poly_clear(h);
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fmpz_poly_clear(p);
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}
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FLINT_TEST_CLEANUP(state);
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flint_printf("PASS\n");
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return 0;
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}
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