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math-ph2026
The existence of full dimensional KAM tori for infinite dimensional Hamiltonian systems with long range interactions
Hongzi Cong, Wanran Ding, Zhihan Zhang +1
We prove the existence of full dimensional KAM tori for infinite dimensional mechanical systems exhibiting long range interactions, under a Diophantine condition of Bourgain type […
math-ph2023
Long-time Anderson Localization for the Nonlinear quasi-periodic Schrödinger Equation on
Hongzi Cong, Yunfeng Shi, W. -M. Wang
Using a Birkhoff normal form transform to impede mode transfer in a finite "barrier", we prove localization of arbitrary data for polynomially long time for the nonlinear…