mirror of
https://github.com/vale981/arb
synced 2025-03-05 09:21:38 -05:00
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/*
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Copyright (C) 2014 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 "acb_hypgeom.h"
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void
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acb_hypgeom_pfq_direct(acb_t res, acb_srcptr a, slong p, acb_srcptr b, slong q,
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const acb_t z, slong n, slong prec)
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{
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acb_t s, t;
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mag_t err, C;
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acb_init(s);
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acb_init(t);
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mag_init(err);
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mag_init(C);
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if (n < 0)
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n = acb_hypgeom_pfq_choose_n(a, p, b, q, z, prec);
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acb_hypgeom_pfq_sum(s, t, a, p, b, q, z, n, prec);
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if (!acb_is_zero(t))
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{
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acb_hypgeom_pfq_bound_factor(C, a, p, b, q, z, n);
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acb_get_mag(err, t);
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mag_mul(err, err, C);
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if (_acb_vec_is_real(a, p) && _acb_vec_is_real(b, q) && acb_is_real(z))
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arb_add_error_mag(acb_realref(s), err);
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else
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acb_add_error_mag(s, err);
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}
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acb_set(res, s);
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acb_clear(s);
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acb_clear(t);
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mag_clear(err);
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mag_clear(C);
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}
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