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Small denominators. I: Mapping the circle onto itself. (Kleine Nenner. I: Über Abbildungen der Kreisperipherie auf sich.) (Russian) Zbl 0135.42603

Izv. Akad. Nauk SSSR, Ser. Mat. 25, 21-86 (1961); correction ibid. 28, 479-480 (1964).

MSC:

37E10 Dynamical systems involving maps of the circle
70-XX Mechanics of particles and systems
34-XX Ordinary differential equations
Full Text: MNR