Quasiperiodic Poincaré Persistence at High Degeneracy
ADVANCES IN MATHEMATICS(2024)
摘要
For Hamiltonian systems with high-order degenerate perturbation, we study the persistence of resonant invariant tori, where the resonant tori might be elliptic, hyperbolic or mixed types. As a consequence, we prove a quasiperiodic Poincaré theorem at high degeneracy. This answers a long standing conjecture on the persistence of resonant invariant tori in general situations.
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关键词
Hamiltonian systems,High-order degenerate perturbation,KAM theory,Resonant invariant tori,Quasiperiodic Poincaré theorem
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