English

Special $p$-groups acting on compact manifolds

Differential Geometry 2019-12-24 v2 Group Theory

Abstract

Riera proved at arXiv:1412.6964 that the diffeomorphism group of particular compact manifolds are not Jordan by exhibiting subgroups isomorphic to extra-special pp-groups of exponent pp for primes pp satisfying some conditions. Generalising the methods of that paper, we construct a compact connected smooth real manifold for every natural number rr whose diffeomorphism group contains not only every extra-special pp-group, but also every special pp-group of order prp^r independently of its exponent for every prime pp. We obtain a similar statement about finite Heisenberg groups as well as we display a very explicit counterexample to the conjecture of Ghys about Jordan property of diffeomorphism group of compact manifolds.

Keywords

Cite

@article{arxiv.1901.07319,
  title  = {Special $p$-groups acting on compact manifolds},
  author = {Dávid R. Szabó},
  journal= {arXiv preprint arXiv:1901.07319},
  year   = {2019}
}

Comments

11 pages, minor adjustments in text

R2 v1 2026-06-23T07:18:26.311Z