A topometric Effros theorem - Archive ouverte HAL
Pré-Publication, Document De Travail Année : 2022

A topometric Effros theorem

Résumé

Given a continuous and isometric action of a Polish group $G$ on an adequate Polish topometric space $(X,\tau,\rho)$ and $x \in X$, we find a necessary and sufficient condition for $\overline{Gx}^\rho$ to be co-meagre; we also obtain a criterion that characterizes when such a point exists. This work completes a criterion established in earlier work of the authors.
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Dates et versions

hal-03768991 , version 1 (05-09-2022)
hal-03768991 , version 2 (15-01-2023)

Identifiants

Citer

Itaï Ben Yaacov, Julien Melleray. A topometric Effros theorem. 2022. ⟨hal-03768991v1⟩

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