58:14
published on October 30, 2025
Equivariant trisections for group actions on four-manifolds
By Jeffrey Meier
Critical regularity and subexponential growth
Appears in collection : Foliations and Diffeomorphism Groups / Feuilletages et Groupes de Difféomorphisme
Two groups are elementarily equivalent if they have the same sets of true firstorder group theoretic sentences. We prove that if the homeomorphism groups of two compact connected manifolds are elementarily equivalent, then the manifolds are homeomorphic. This generalizes Whittaker's theorem on isomorphic homeomorphism groups (1963) without relying on it. Joint work with Thomas Koberda (UVa) and Javier de la Nuez-Gonzalez (KIAS).
