mirror of
https://github.com/vale981/arb
synced 2025-03-06 09:51:39 -05:00
100 lines
3 KiB
C
100 lines
3 KiB
C
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/*=============================================================================
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This file is part of ARB.
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ARB 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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ARB 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 ARB; 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) 2016 Fredrik Johansson
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******************************************************************************/
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#include "acb_poly.h"
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int main()
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{
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slong iter;
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flint_rand_t state;
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flint_printf("taylor_shift_convolution....");
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fflush(stdout);
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flint_randinit(state);
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for (iter = 0; iter < 2000; iter++)
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{
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slong prec1, prec2;
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acb_poly_t f, g;
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acb_t c, d, e;
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prec1 = 2 + n_randint(state, 500);
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prec2 = 2 + n_randint(state, 500);
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acb_poly_init(f);
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acb_poly_init(g);
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acb_init(c);
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acb_init(d);
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acb_init(e);
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acb_poly_randtest(f, state, 1 + n_randint(state, 40), 1 + n_randint(state, 500), 10);
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acb_poly_randtest(g, state, 1 + n_randint(state, 20), 1 + n_randint(state, 500), 10);
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if (n_randint(state, 2))
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acb_set_si(c, n_randint(state, 5) - 2);
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else
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acb_randtest(c, state, 1 + n_randint(state, 500), 1 + n_randint(state, 100));
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if (n_randint(state, 2))
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acb_set_si(d, n_randint(state, 5) - 2);
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else
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acb_randtest(d, state, 1 + n_randint(state, 500), 1 + n_randint(state, 100));
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acb_add(e, c, d, prec1);
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/* check f(x+c)(x+d) = f(x+c+d) */
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acb_poly_taylor_shift_convolution(g, f, e, prec2);
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acb_poly_taylor_shift_convolution(f, f, c, prec1);
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acb_poly_taylor_shift_convolution(f, f, d, prec1);
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if (!acb_poly_overlaps(f, g))
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{
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flint_printf("FAIL\n\n");
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flint_printf("c = "); acb_printd(c, 15); flint_printf("\n\n");
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flint_printf("d = "); acb_printd(d, 15); flint_printf("\n\n");
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flint_printf("f = "); acb_poly_printd(f, 15); flint_printf("\n\n");
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flint_printf("g = "); acb_poly_printd(g, 15); flint_printf("\n\n");
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abort();
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}
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acb_poly_clear(f);
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acb_poly_clear(g);
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acb_clear(c);
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acb_clear(d);
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acb_clear(e);
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}
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flint_randclear(state);
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flint_cleanup();
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flint_printf("PASS\n");
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return EXIT_SUCCESS;
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}
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