void _arb_poly_sinh_cosh_series(arb_ptr s, arb_ptr c, const arb_srcptr h, slong hlen, slong n, slong prec) { hlen = FLINT_MIN(hlen, n); if (hlen == 1) { arb_sinh_cosh(s, c, h, prec); _arb_vec_zero(s + 1, n - 1); _arb_vec_zero(c + 1, n - 1); } else if (n == 2) { arb_t t; arb_init(t); arb_set(t, h + 1); arb_sinh_cosh(s, c, h, prec); arb_mul(s + 1, c, t, prec); arb_mul(c + 1, s, t, prec); arb_clear(t); } else if (hlen < 60 || n < 120) _arb_poly_sinh_cosh_series_basecase(s, c, h, hlen, n, prec); else _arb_poly_sinh_cosh_series_exponential(s, c, h, hlen, n, prec); }
void arb_poly_sinh_cosh_series_basecase(arb_poly_t s, arb_poly_t c, const arb_poly_t h, slong n, slong prec) { slong hlen = h->length; if (n == 0) { arb_poly_zero(s); arb_poly_zero(c); return; } if (hlen == 0) { arb_poly_zero(s); arb_poly_one(c); return; } arb_poly_fit_length(s, n); arb_poly_fit_length(c, n); _arb_poly_sinh_cosh_series_basecase(s->coeffs, c->coeffs, h->coeffs, hlen, n, prec); _arb_poly_set_length(s, n); _arb_poly_normalise(s); _arb_poly_set_length(c, n); _arb_poly_normalise(c); }