Normalization of a Periodic Hamiltonian System

2020 ◽  
Vol 46 (2) ◽  
pp. 76-83 ◽  
Author(s):  
A. D. Bruno
2011 ◽  
Vol 2011 ◽  
pp. 1-17 ◽  
Author(s):  
Jia Li ◽  
Junxiang Xu

We consider the following real two-dimensional nonlinear analytic quasi-periodic Hamiltonian systemx˙=J∇xH, whereH(x,t,ε)=(1/2)β(x12+x22)+F(x,t,ε)withβ≠0,∂xF(0,t,ε)=O(ε)and∂xxF(0,t,ε)=O(ε)asε→0. Without any nondegeneracy condition with respect to ε, we prove that for most of the sufficiently small ε, by a quasi-periodic symplectic transformation, it can be reduced to a quasi-periodic Hamiltonian system with an equilibrium.


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