scholarly journals An extension of Dragilev’s theorem for the existence of periodic solutions of the Liénard equation

2015 ◽  
Vol 127 ◽  
pp. 55-70 ◽  
Author(s):  
Martina Cioni ◽  
Gabriele Villari
1993 ◽  
Vol 113 (2) ◽  
pp. 413-422 ◽  
Author(s):  
Jitsuro Sugie ◽  
Toshiaki Yoneyama

The problem of periodicity of solutions of the generalized Liénard equationhas attracted much attention. Many efforts have been made to give sufficient conditions to guarantee the existence and the uniqueness of periodic solutions (limit cycles) of (1·1). There are also some papers on the number of limit cycles of (1·1) (see, for example, [3, 5, 6, 13]). However, there are only a few results on non-existence of periodic solutions of (1·1).


2008 ◽  
Vol 219 (1) ◽  
pp. 263-275 ◽  
Author(s):  
Xin-Ge Liu ◽  
Mei-Lan Tang ◽  
Ralph R. Martin

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