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 Trudy Mat. Inst. Steklova, 2020, Volume 310, Pages 19–32 (Mi tm4119)

Local Adiabatic Invariants Near a Homoclinic Set of a Slow–Fast Hamiltonian System

Sergey V. Bolotin

Steklov Mathematical Institute of Russian Academy of Sciences, ul. Gubkina 8, Moscow, 119991 Russia

Abstract: In slow–fast systems, fast variables change at a rate of the order of one, and slow variables, at a rate of the order of $\varepsilon \ll 1$. The system obtained for $\varepsilon =0$ is said to be frozen. If the frozen (fast) system has one degree of freedom, then in the region where the level curves of the frozen Hamiltonian are closed there exists an adiabatic invariant. A. Neishtadt showed that near a separatrix of the frozen system the adiabatic invariant exhibits quasirandom jumps of order $\varepsilon$. In this paper we partially extend Neishtadt's result to the multidimensional case. We show that if the frozen system has a hyperbolic critical point possessing several transverse homoclinics, then for small $\varepsilon$ there exist trajectories shadowing homoclinic chains. The slow variables evolve in a quasirandom way, shadowing trajectories of systems with Hamiltonians similar to adiabatic invariants. This paper extends the work of V. Gelfreich and D. Turaev, who considered similar phenomena away from critical points of the frozen Hamiltonian.

 Funding Agency Grant Number Russian Science Foundation 19-71-30012 This work is supported by the Russian Science Foundation under grant 19-71-30012.

DOI: https://doi.org/10.4213/tm4119

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English version:
Proceedings of the Steklov Institute of Mathematics, 2020, 310, 12–24

Bibliographic databases:

UDC: 517.928.7+517.933
Revised: April 25, 2020
Accepted: April 28, 2020

Citation: Sergey V. Bolotin, “Local Adiabatic Invariants Near a Homoclinic Set of a Slow–Fast Hamiltonian System”, Selected issues of mathematics and mechanics, Collected papers. On the occasion of the 70th birthday of Academician Valery Vasil'evich Kozlov, Trudy Mat. Inst. Steklova, 310, Steklov Math. Inst., Moscow, 2020, 19–32; Proc. Steklov Inst. Math., 310 (2020), 12–24

Citation in format AMSBIB
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