We explain the properties of the familiar properties of continuous actions of groups on sets, and then explain how the reasoning involved can be extended to categories of monoid actions. By examining to what extent a topological monoid can be recovered from its topos of actions, we obtain a complete characterization of these toposes in terms of the existence of a point with certain properties. This presentation is based on the recent preprint of the same title.
By Dustin Clausen
By Riccardo Zanfa
By Jean-Claude Belfiore
By Daniel Bennequin
By Samson Abramsky
By Jens Hemelaer
By Francesco Genovese
By Christoph Koutschan
By Christoph Koutschan
By Christiane Koch
By Zizhuo Tony Jin
By Viviane Pons
By Viviane Pons
By Olivier Benoist
