Positive periodic solutions of nonlinear differential systems with impulses

2008 ◽  
Vol 68 (8) ◽  
pp. 2389-2405 ◽  
Author(s):  
Yongkun Li
1993 ◽  
Vol 24 (2) ◽  
pp. 173-188
Author(s):  
LIHONG HUANG ◽  
JIANSHE YU

In this paper three theorems on the existence of nontrivial periodic solutions of the system \[ dx/dt =e(y)\]\[dy/dt =-e(y)f(x)- g(x)\] are proved, which not only generalize some known results on the existence of periodic solutions of Lienard's system (i.e. the special form for $e(y) = y$), but also relax or eliminate some traditional assumptions.


2005 ◽  
Vol 25 (2) ◽  
pp. 263 ◽  
Author(s):  
Xiaoning Lin ◽  
Daqing Jiang ◽  
Donal O'Regan ◽  
Ravi P. Agarwal

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