mirror of
https://github.com/vale981/arb
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67 lines
2 KiB
C
67 lines
2 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) 2016 Fredrik Johansson
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******************************************************************************/
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#include "acb_hypgeom.h"
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void
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_acb_hypgeom_erfi_series(acb_ptr g, acb_srcptr h, slong hlen, slong len, slong prec)
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{
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hlen = FLINT_MIN(hlen, len);
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if (hlen == 1)
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{
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acb_hypgeom_erfi(g, h, prec);
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_acb_vec_zero(g + 1, len - 1);
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}
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else
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{
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slong k;
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acb_ptr t = _acb_vec_init(hlen);
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for (k = 0; k < hlen; k++)
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acb_mul_onei(t + k, h + k);
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_acb_hypgeom_erf_series(g, t, hlen, len, prec);
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for (k = 0; k < len; k++)
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acb_div_onei(g + k, g + k);
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_acb_vec_clear(t, hlen);
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}
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}
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void
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acb_hypgeom_erfi_series(acb_poly_t g, const acb_poly_t h, slong len, slong prec)
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{
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slong hlen = h->length;
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if (hlen == 0 || len == 0)
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{
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acb_poly_zero(g);
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return;
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}
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acb_poly_fit_length(g, len);
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_acb_hypgeom_erfi_series(g->coeffs, h->coeffs, hlen, len, prec);
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_acb_poly_set_length(g, len);
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_acb_poly_normalise(g);
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}
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