On KAM theory
As a motivation for this chapter we refer to the historical remarks of §2.2.5 and the references given there. The main question is to what extent a quasi-periodic subsystem, as defined in §2.2.3, is persistent under a small perturbation of the whole system, or say, under variation of parameters; see §3.2.
KeywordsRotation Number Translation System Periodic Attractor Small Divisor Diophantine Condition
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