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https://github.com/vale981/arb
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42 lines
985 B
C
42 lines
985 B
C
/*
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Copyright (C) 2013 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.h"
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#include "acb.h"
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void
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arb_hurwitz_zeta(arb_t res, const arb_t s, const arb_t z, slong prec)
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{
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if (!arb_contains_si(s, 1) &&
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(arb_is_positive(z) ||
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(arb_is_int(z) && arb_is_int(s) && arb_is_nonpositive(s))))
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{
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acb_t a, b, c;
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acb_init(a);
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acb_init(b);
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acb_init(c);
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acb_set_arb(a, s);
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acb_set_arb(b, z);
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acb_hurwitz_zeta(c, a, b, prec);
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arb_set(res, acb_realref(c));
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acb_clear(a);
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acb_clear(b);
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acb_clear(c);
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}
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else
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{
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arb_indeterminate(res);
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}
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}
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