Talk:Denjoy's theorem on rotation number
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This needs a diagram, at the very least. (Experiment123)
- Isn't Denjoy counterexample more common? Maybe we can create an article on circle diffeomorphisms with results by Denjoy, Herman, Hill, the renormalization group analysis, Arnold tongues, ... — XaosBits 03:42, 10 March 2006 (UTC)