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/*
Copyright (C) 2013 Fredrik Johansson
This file is part of FLINT.
FLINT is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "fmpz_poly.h"
#include "arb.h"
#include "hypgeom.h"
static void
arb_const_e_eval(arb_t s, slong prec)
{
hypgeom_t series;
arb_t t;
arb_init(t);
hypgeom_init(series);
fmpz_poly_set_str(series->A, "1 1");
fmpz_poly_set_str(series->B, "1 1");
fmpz_poly_set_str(series->P, "1 1");
fmpz_poly_set_str(series->Q, "2 0 1");
prec += FLINT_CLOG2(prec);
arb_hypgeom_infsum(s, t, series, prec, prec);
arb_div(s, s, t, prec);
hypgeom_clear(series);
arb_clear(t);
}
ARB_DEF_CACHED_CONSTANT(arb_const_e, arb_const_e_eval)
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