mirror of
https://github.com/vale981/arb
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52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
/*
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Copyright (C) 2015 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_poly.h"
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void
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_arb_poly_cot_pi_series(arb_ptr g, arb_srcptr h, slong hlen, slong len, slong prec)
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{
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hlen = FLINT_MIN(hlen, len);
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if (hlen == 1)
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{
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arb_cot_pi(g, h, prec);
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_arb_vec_zero(g + 1, len - 1);
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}
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else
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{
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arb_ptr t, u;
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t = _arb_vec_init(len);
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u = _arb_vec_init(len);
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_arb_poly_sin_cos_pi_series(t, u, h, hlen, len, prec);
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_arb_poly_div_series(g, u, len, t, len, len, prec);
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_arb_vec_clear(t, len);
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_arb_vec_clear(u, len);
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}
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}
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void
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arb_poly_cot_pi_series(arb_poly_t res, const arb_poly_t f, slong len, slong prec)
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{
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arb_poly_fit_length(res, len);
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if (f->length == 0 || len == 0)
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_arb_vec_indeterminate(res->coeffs, len);
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else
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_arb_poly_cot_pi_series(res->coeffs, f->coeffs, f->length, len, prec);
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_arb_poly_set_length(res, len);
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_arb_poly_normalise(res);
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}
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