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Jul 4, 2011 at 20:01 vote accept Kate Juschenko
Jul 4, 2011 at 20:01 vote accept Kate Juschenko
Jul 4, 2011 at 20:01
Jun 14, 2011 at 12:11 comment added Kate Juschenko Thank you, Sven, your reference is new for me. I think it is OK to skip the condition that the group is the union of these sets, since it is clear that the condition that I've wrote and existence of left-invariant mean contradict to each other. thus from this condition follows that the group is not amenable. the other way needs more work.
Jun 13, 2011 at 19:53 history answered Sven Raum CC BY-SA 3.0