`qfb_inverse`

Synopsis#include <flint/qfb.h>

void qfb_inverse(qfb_t r, qfb_t f)source

Sets $r$ to the reduced inverse of the reduced form $f$ : $(a, -b, c)$ , or $f$ itself if $a = b$ or $a = c$ (such forms have order at most 2).

Guides#

Computing in the class group

Cite this page

The FLINT team, “qfb_inverse (qfb.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/qfb/qfb_inverse.html (generated 2026-11-02).

@misc{flint-doc-qfb-qfb-inverse,
  author       = {{The FLINT team}},
  title        = {{qfb\_inverse (qfb.h)}},
  howpublished = {FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev},
  year         = {2026},
  url          = {https://flintlib.org/doc/qfb/qfb_inverse.html},
  note         = {Generated 2026-11-02}
}

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