`acb_lambertw_check_branch`

Synopsis#include <flint/acb.h>

int acb_lambertw_check_branch(const acb_t w, const fmpz_t k, slong prec)source

Returns 1 if w certainly lies in the image of the branch W_k. This is used to verify that a computed approximation is on the intended branch; it is false for points on or overlapping the branch cuts.

Cite this page

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

@misc{flint-doc-acb-acb-lambertw-check-branch,
  author       = {{The FLINT team}},
  title        = {{acb\_lambertw\_check\_branch (acb.h)}},
  howpublished = {FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev},
  year         = {2026},
  url          = {https://flintlib.org/doc/acb/acb_lambertw_check_branch.html},
  note         = {Generated 2026-10-20}
}

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