Periodic solutions of ordinary differential equations with quasibounded nonlinearities and of functional differential equations

Author(s):  
Robert E. Gaines ◽  
Jean L. Mawhin
1986 ◽  
Vol 29 (3) ◽  
pp. 299-308 ◽  
Author(s):  
A. J. B. Potter

In [3] Fuller introduced an index (now called the Fuller index) in order to study periodic solutions of ordinary differential equations. The objective of this paper is to give a simple generalisation of the Fuller index which can be used to study periodic points of flows in Banach spaces. We do not claim any significant breakthrough but merely suggest that the simplistic approach, presented here, might prove useful for the study of non-linear differential equations. We show our results can be used to study functional differential equations.


2004 ◽  
Vol 47 (2) ◽  
pp. 307-327
Author(s):  
Takeshi Nishikawa ◽  
Nguyen Van Minh ◽  
Toshiki Naito

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