FLINT3.7.0-dev

acb_theta_char_is_even

Synopsis#include <flint/acb_theta.h>
int acb_theta_char_is_even(ulong ab, slong g)source

Returns whether the characteristic (a,b) is even, that is, a^T b is even. For odd characteristics, \theta_{a,b}(0, \tau) vanishes identically.

Cite this page

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