mirror of
https://github.com/vale981/arb
synced 2025-03-05 17:31:38 -05:00
65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/*
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Copyright (C) 2018 Fredrik Johansson
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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 it under
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the terms of the GNU Lesser General Public License (LGPL) as published
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by the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version. See <http://www.gnu.org/licenses/>.
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*/
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#include "arb_mat.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("dct....");
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fflush(stdout);
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flint_randinit(state);
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for (iter = 0; iter < 100 * arb_test_multiplier(); iter++)
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{
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arb_mat_t A, Ainv, AT;
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slong n, prec;
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n = n_randint(state, 10);
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prec = 53 + n_randint(state, 30);
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arb_mat_init(A, n, n);
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arb_mat_init(Ainv, n, n);
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arb_mat_init(AT, n, n);
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arb_mat_randtest(A, state, 100, 10);
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arb_mat_dct(A, 0, prec);
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if (!arb_mat_inv(Ainv, A, prec))
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{
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flint_printf("FAIL: small DCT matrix (n = %wd) not invertible\n", n);
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flint_abort();
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}
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arb_mat_transpose(AT, A);
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if (!arb_mat_overlaps(AT, Ainv))
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{
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flint_printf("FAIL: overlap (n = %wd)\n", n);
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flint_printf("A = \n"); arb_mat_printd(A, 15); flint_printf("\n\n");
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flint_printf("Ainv = \n"); arb_mat_printd(Ainv, 15); flint_printf("\n\n");
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flint_printf("AT = \n"); arb_mat_printd(AT, 15); flint_printf("\n\n");
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flint_abort();
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}
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arb_mat_clear(A);
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arb_mat_clear(Ainv);
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arb_mat_clear(AT);
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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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