Skip to main content
14 events
when toggle format what by license comment
Dec 22, 2010 at 17:13 vote accept Hugo Chapdelaine
Dec 22, 2010 at 17:13 vote accept Hugo Chapdelaine
Dec 22, 2010 at 17:13
Dec 22, 2010 at 17:11 vote accept Hugo Chapdelaine
Dec 22, 2010 at 17:13
Dec 22, 2010 at 17:11 vote accept Hugo Chapdelaine
Dec 22, 2010 at 17:11
Dec 22, 2010 at 17:11 vote accept Hugo Chapdelaine
Dec 22, 2010 at 17:11
Dec 22, 2010 at 17:10 vote accept Hugo Chapdelaine
Dec 22, 2010 at 17:11
Dec 22, 2010 at 16:52 comment added Ryan Budney @Igor: It's true that not all homeomorphisms are smooth, but homeomorphism and diffeomorphism groups are always comparable as there's an injection from one to the other. @Hugo: in general MO isn't a place for "tell me about X" type questions. Question-askers have an obligation to be fairly specific. Other than your first "what can we say in general about..." question, it appears your more specific questions have been answered.
Dec 22, 2010 at 16:29 answer added Igor Rivin timeline score: 6
Dec 22, 2010 at 16:25 comment added Igor Rivin Diffeomorphism group is quite different from the homeomorphism group, in general (and diffeomorphism group for different degrees of smoothness are quite different from one another.
Dec 22, 2010 at 15:45 comment added Ryan Budney (2) generally no. (1) see Landsburg's answer below. If you want to get a sense for $Aut(M)$ search MO for things like "diffeomorphism group". Also, there's this: mathoverflow.net/questions/18034/can-we-decompose-diffmxn
Dec 22, 2010 at 14:32 comment added Hugo Chapdelaine Indeed Daniel, the question is quite broad!
Dec 22, 2010 at 14:26 comment added Daniel Moskovich I find the question much too broad.
Dec 22, 2010 at 14:06 answer added Steven Landsburg timeline score: 7
Dec 22, 2010 at 13:32 history asked Hugo Chapdelaine CC BY-SA 2.5