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40 lines
901 B
C
40 lines
901 B
C
/*
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Copyright (C) 2016 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 "mag.h"
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void
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mag_hurwitz_zeta_uiui(mag_t res, ulong s, ulong a)
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{
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if (s <= 1 || a == 0)
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{
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mag_inf(res);
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}
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else
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{
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mag_t t, u;
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mag_init(t);
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mag_init(u);
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mag_one(t);
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mag_set_ui_lower(u, a);
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mag_pow_ui_lower(u, u, s - 1);
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mag_mul_ui_lower(res, u, a);
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mag_div(res, t, res);
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mag_mul_ui_lower(u, u, s - 1);
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mag_div(u, t, u);
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mag_add(res, res, u);
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mag_clear(t);
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mag_clear(u);
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}
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}
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