acb_modular_delta
Synopsis
#include <flint/acb_modular.h>Sets z to the modular discriminant \Delta(\tau) = \eta(\tau)^{24}, computed as (\theta_2 \theta_3 \theta_4 / 2)^8, which transforms as \Delta(g\tau) = (c\tau+d)^{12} \Delta(\tau). The discriminant is sometimes defined with an extra factor (2\pi)^{12}, which is omitted here.
Cite this page
The FLINT team, “acb_modular_delta (acb_modular.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/acb_modular/acb_modular_delta.html (generated 2026-10-20).
@misc{flint-doc-acb-modular-acb-modular-delta,
author = {{The FLINT team}},
title = {{acb\_modular\_delta (acb\_modular.h)}},
howpublished = {FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev},
year = {2026},
url = {https://flintlib.org/doc/acb_modular/acb_modular_delta.html},
note = {Generated 2026-10-20}
}