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Nov 5, 2017 at 23:56 history edited David Roberts CC BY-SA 3.0
added 167 characters in body
Nov 5, 2017 at 23:41 history edited David Roberts CC BY-SA 3.0
Updated link to paper
Mar 17, 2010 at 10:28 history edited Andrew Stacey CC BY-SA 2.5
Finally answered the question.
Mar 14, 2010 at 15:26 history edited Andrew Stacey CC BY-SA 2.5
Added link to new nlab page
Mar 12, 2010 at 0:42 comment added David Roberts Expanding Andrew's comment above about 2-structure, one may be able to describe a Lie groupoid which presents a smooth stack of paths up to thin homotopy. I echo the above sentiment, this would be a good nlab project (not necessarily linked with mine and Andrew's)
Mar 11, 2010 at 22:02 vote accept Theo Johnson-Freyd
Mar 11, 2010 at 21:23 comment added Andrew Stacey That would be worth settling once and for all, I've wondered off-and-on about this. However, I think that that's an nlab project rather than an MO one, and I'll only start it if I know that others (you and Theo?) will join in!
Mar 11, 2010 at 16:58 comment added Konrad Waldorf Great answer, Andrew! But can we be more specific? Given any assumption on a possible manifold structure on $P_1(M)$ (e.g. that the projections to $M$ are submersions), can one prove that there is no such manifold structure?
Mar 11, 2010 at 9:02 history answered Andrew Stacey CC BY-SA 2.5