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https://github.com/vale981/arb
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46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/*=============================================================================
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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
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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ARB is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with ARB; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2012 Fredrik Johansson
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******************************************************************************/
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#include "zeta.h"
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void
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zeta_ui_asymp(fmprb_t x, ulong s, long prec)
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{
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fmprb_set_ui(x, 1UL);
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if (s != 2 && s > prec)
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{
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fmprb_add_error_2exp_si(x, -prec);
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}
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else
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{
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fmpr_t t;
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fmpr_init(t);
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fmpr_set_ui_2exp_si(t, 1, -s);
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fmprb_add_fmpr(x, x, t, prec);
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fmprb_add_error_2exp_si(x, 2 - (3 * s) / 2);
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fmpr_clear(t);
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}
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}
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