scholarly journals Lower dimensional invariant tori with prescribed frequency for nonlinear wave equation

2010 ◽  
Vol 249 (11) ◽  
pp. 2796-2821 ◽  
Author(s):  
Jiansheng Geng ◽  
Xiufang Ren
2003 ◽  
Vol 2003 (18) ◽  
pp. 1111-1136 ◽  
Author(s):  
Xiaoping Yuan

It is shown that there are plenty of hyperbolic-elliptic invariant tori, thus quasiperiodic solutions for a class of nonlinear wave equations.


2021 ◽  
Vol 62 (3) ◽  
pp. 031512
Author(s):  
Adel M. Al-Mahdi ◽  
Mohammad M. Al-Gharabli ◽  
Mohammad Kafini ◽  
Shadi Al-Omari

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