Rigidity and flexibility of group actions on the circle
نویسنده
چکیده
3 An introduction to rigidity 7 3.1 Local rigidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.2 Full rigidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.3 Strong (Mostow) Rigidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.4 The Zimmer program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
منابع مشابه
Reduction of cocycles and groups of diffeomorphisms of the circle
We prove two theorems of reduction of cocycles taking values in the group of diffeomorphisms of the circle. They generalise previous results obtained by the author concerning rigidity for smooth actions on the circle of Kazhdan’s groups and higher rank lattices. Subject classification AMS (2000): primary 57S20; secondary 37A20.
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