English

The Hard Lefschetz Theorem on K\"ahler Lie Algebroids

Differential Geometry 2026-05-26 v2

Abstract

Compact K\"ahler manifolds classically satisfy the Hard Lefschetz Theorem, which gives strong control on the underlying topology of the manifold. One expects a similar theorem to be true for K\"ahler Lie Algebroids, and we show for a certain class of them that this is indeed true, with an added ellipticity requirement. We provide examples of Lie Algebroids satisfying this, as well as an example of a K\"ahler Lie Algebroid that does not meet this Ellipticity requirement, and consequently fails to satisfy the Hard Lefschetz condition.

Keywords

Cite

@article{arxiv.2504.12550,
  title  = {The Hard Lefschetz Theorem on K\"ahler Lie Algebroids},
  author = {Shane Rankin},
  journal= {arXiv preprint arXiv:2504.12550},
  year   = {2026}
}

Comments

Updated to reflect version in IJM