The purpose of this brief note is twofold. First, we summarize in a very concise form the principal information on Whitney smooth families of quasi-periodic invariant tori in various contexts of KAM theory. Our second goal is to attract (via an informal discussion and a simple example) the experts’ attention to the peculiarities of the so-called excitation of elliptic normal modes in the reversible context 2.
Keywords:
KAM theory, quasi-periodic invariant tori, Whitney smooth families, proper destruction of resonant tori, excitation of elliptic normal modes, reversible context 2
Citation:
Sevryuk M. B., Families of Invariant Tori in KAM Theory: Interplay of Integer Characteristics, Regular and Chaotic Dynamics,
2017, Volume 22, Number 6,
pp. 603–615