d_randtest_signed
Synopsis
#include <flint/double_extras.h>double d_randtest_signed(flint_rand_t state, slong minexp, slong maxexp)sourceReturns m 2^e, -m 2^e or zero with probability 1/3 each, where m is a value of d_randtest and e is uniform in [\mathit{minexp}, \mathit{maxexp}], so that a nonzero result has absolute value in [2^{e-1}, 2^e). Requires \mathit{minexp} \le \mathit{maxexp}; values outside the double range overflow to infinity or underflow (through ldexp).
Cite this page
The FLINT team, “d_randtest_signed (double_extras.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/double_extras/d_randtest_signed.html (generated 2026-10-20).
@misc{flint-doc-double-extras-d-randtest-signed,
author = {{The FLINT team}},
title = {{d\_randtest\_signed (double\_extras.h)}},
howpublished = {FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev},
year = {2026},
url = {https://flintlib.org/doc/double_extras/d_randtest_signed.html},
note = {Generated 2026-10-20}
}