Timeline for Automorphism groups and etale topological stacks

Current License: CC BY-SA 3.0

12 events

when toggle format	what		by	license	comment
May 10, 2011 at 13:14	comment	added	S. Carnahan♦		This is not particularly important, but it might be good to change "begs the question" to "suggests the question", since the former is often used to mean something else.
May 9, 2011 at 13:40	vote	accept	David Carchedi
May 9, 2011 at 5:11	comment	added	David Roberts♦		One thing you might consider (perhaps it is too strong) is using regular topological groupoids (as defined in Ehresmann's 1959 article on topological and smooth stacks. These have a nice structure theory analogous to Lie groupoids, but might be too restrictive for you purposes. As you might guess, these also use folations, in the sense that the fibres of the source and target maps give rise to folations of the arrow space. But check that article for precise definitions.
May 8, 2011 at 21:31	history	edited	David Carchedi	CC BY-SA 3.0	added 8 characters in body
May 8, 2011 at 21:31	comment	added	David Carchedi		@Chris: Yes, I meant to say representable epimorphism.
May 8, 2011 at 14:46	comment	added	Chris Schommer-Pries		Surely you want the representable map $X \to \mathcal{X}$ to have some additional property like being surjective?
May 8, 2011 at 12:27	answer	added	André Henriques		timeline score: 5
May 8, 2011 at 11:56	answer	added	Angelo		timeline score: 8
May 8, 2011 at 10:47	history	edited	David Carchedi	CC BY-SA 3.0	Added definition of topological stack
May 8, 2011 at 10:43	comment	added	David Carchedi		Yes, depending on which article of his. I mean what he refers to as a "pretopological stack" in "Foundations of Topological Stacks I". I'll add this to the question.
May 8, 2011 at 4:21	comment	added	Angelo		What do you mean by a topological stack? Is it in the sense of Noohi?
May 8, 2011 at 1:01	history	asked	David Carchedi	CC BY-SA 3.0