FLINT3.7.0-dev
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arb_fpwrap_double_atan2

Synopsis#include <flint/arb_fpwrap.h>
int arb_fpwrap_double_atan2(double * res, double x1, double x2, int flags)source

Computes the two-argument arctangent \operatorname{atan2}(x_1, x_2), the argument of the point (x_2, x_1), as arb_atan2 with y = x_1 and x = x_2. It fails at the origin.

Cite this page

The FLINT team, “arb_fpwrap_double_atan2 (arb_fpwrap.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/arb_fpwrap/arb_fpwrap_double_atan2.html (generated 2026-10-20).