Gen-Qiang Wang, Sui Sun Cheng
Abstract:
Based on a continuation theorem of Mawhin, periodic solutions are found for 
difference equations of the form 
\[\Delta ^{k}y_{n}=f( n,y_{n},y_{n-1},\cdots ,y_{n-l}),\quad n\in Z. \]
Keywords: 
Periodic solution, difference equation, continuation theorem.
MSC 2000: 39A11