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Sep 5, 2012 at 14:44 answer added Eugene Lerman timeline score: 3
Sep 5, 2012 at 13:29 vote accept Mostafa
Sep 5, 2012 at 12:33 comment added Mostafa An effective action of a group $G$ on $M$ is an action such that there is a set of full measure $F \subset M$ such that for any $x \in F$, there is $g \in G$ such that $gx \not\eq x$. Yes, I allow boundary.
Sep 4, 2012 at 21:06 answer added Liviu Nicolaescu timeline score: 8
Sep 4, 2012 at 19:48 answer added Anton Petrunin timeline score: 7
Sep 4, 2012 at 19:13 answer added Renato G. Bettiol timeline score: 9
Sep 4, 2012 at 18:54 comment added Ben McKay Your example has a boundary. Do you want to allow boundary?
Sep 4, 2012 at 16:17 answer added Will Sawin timeline score: 7
Sep 4, 2012 at 16:08 comment added algori Mustafa --what exactly do you mean by an "effective action of a circle"?
Sep 4, 2012 at 16:00 history asked Mostafa CC BY-SA 3.0