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This article is cited in 5 scientific papers (total in 5 papers)
Alexey Borisov Memorial Volume
Persistence of Multiscale Degenerate Invariant Tori
for Reversible Systems with Multiscale Degenerate
Equilibrium Points
Dongfeng Zhang, Ru Qu School of Mathematics, Southeast University,
210096 Nanjing P.R., China
Abstract:
In this paper, we focus on the persistence of degenerate lower-dimensional invariant
tori with a normal degenerate equilibrium point in reversible systems. Based on the Herman
method and the topological degree theory, it is proved that if the frequency mapping has
nonzero topological degree and the frequency $\omega_0$ satisfies the Diophantine condition, then
the lower-dimensional invariant torus with the frequency $\omega_0$ persists under sufficiently small
perturbations. Moreover, the above result can also be obtained when the reversible system
is Gevrey smooth. As some applications, we apply our theorem to some specific examples to
study the persistence of multiscale degenerate lower-dimensional invariant tori with prescribed
frequencies.
Keywords:
Reversible systems, KAM iteration, topological degree, degenerate lower-dimensional
tori, degenerate equilibrium points.
Received: 29.03.2022 Accepted: 08.11.2022
Citation:
Dongfeng Zhang, Ru Qu, “Persistence of Multiscale Degenerate Invariant Tori
for Reversible Systems with Multiscale Degenerate
Equilibrium Points”, Regul. Chaotic Dyn., 27:6 (2022), 733–756
Linking options:
https://www.mathnet.ru/eng/rcd1190 https://www.mathnet.ru/eng/rcd/v27/i6/p733
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