{{  :news:2026:pontryagin_sphere.png?150|Pontryagin Sphere}}


==== Lorenzo Ruffoni paper accepted in the Bulletin of the London Mathematical Society ====

==== Details ====
Lorenzo Ruffoni (with Sami Douba, Gye-Seon Lee, and Ludovic Marquis) has had the paper
“Convex cocompact groups in real hyperbolic spaces with limit set a Pontryagin sphere”
accepted for publication in the Bulletin of the London Mathematical Society.

A preprint is available here:
[[https://arxiv.org/abs/2502.09470|arXiv:2502.09470]].

Related visualizations of a Pontryagin-sphere limit set:
[[https://public.websites.umich.edu/~tjwei/research.html#pontryagin-sphere|Pontryagin sphere images/animations]].