Periodic solutions for a coupled pair of delay difference equations

Based on the fixed-point index theory for a Banach space, positive periodic solutions are found for a system of delay difference equations. By using such results, the existence of nontrivial periodic solutions for delay difference equations with positive and negative terms is also considered.

Affiliations

1. Department of Mathematics, Qingdao Technological University, Shandong, Qingdao, 266033, China

   • Guang Zhang

2. Department of Mathematics, Yanbei Normal University, Shanxi, Datong, 037000, China

   • Shugui Kang

3. Department of Mathematics, National Tsing Hua University, Hsinchu, 300, Taiwan

   • Sui Sun Cheng

Corresponding author

Correspondence to Guang Zhang.

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