mirror of
https://github.com/vale981/arb
synced 2025-03-05 09:21:38 -05:00
43 lines
1,014 B
C
43 lines
1,014 B
C
/*
|
|
Copyright (C) 2013 Fredrik Johansson
|
|
|
|
This file is part of Arb.
|
|
|
|
Arb 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 2.1 of the License, or
|
|
(at your option) any later version. See <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "arb_poly.h"
|
|
|
|
void
|
|
_arb_poly_inv_borel_transform(arb_ptr res, arb_srcptr poly, slong len, slong prec)
|
|
{
|
|
slong i;
|
|
|
|
arb_t t;
|
|
arb_init(t);
|
|
|
|
arb_one(t);
|
|
|
|
for (i = 0; i < len; i++)
|
|
{
|
|
if (i > 1)
|
|
arb_mul_ui(t, t, i, prec);
|
|
|
|
arb_mul(res + i, poly + i, t, prec);
|
|
}
|
|
|
|
arb_clear(t);
|
|
}
|
|
|
|
void
|
|
arb_poly_inv_borel_transform(arb_poly_t res, const arb_poly_t poly, slong prec)
|
|
{
|
|
arb_poly_fit_length(res, poly->length);
|
|
_arb_poly_inv_borel_transform(res->coeffs, poly->coeffs, poly->length, prec);
|
|
_arb_poly_set_length(res, poly->length);
|
|
_arb_poly_normalise(res);
|
|
}
|
|
|