FLINT3.7.0-dev

acb_modular_eta

Synopsis#include <flint/acb_modular.h>
void acb_modular_eta(acb_t z, const acb_t tau, slong prec)source

Sets z to the Dedekind eta function \eta(\tau) = e^{\pi i \tau/12} \prod_{n \ge 1} (1 - e^{2\pi i n\tau}), by moving \tau to the fundamental domain, summing the pentagonal number series with acb_modular_eta_sum, and applying the transformation formula.

Cite this page

The FLINT team, “acb_modular_eta (acb_modular.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/acb_modular/acb_modular_eta.html (generated 2026-10-20).