Journal of Jilin University Science Edition ›› 2018, Vol. 56 ›› Issue (6): 1291-1298.

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Existence of Periodic Solutions for HigherOrderDifferential Equations with Multiple Delays#br#

ZHANG Huan, LI Yongxiang   

  1. College of Mathematics and Statistics, Northwest Normal University, Lanzhou 730070, China
  • Received:2017-11-17 Online:2018-11-26 Published:2018-11-23

Key words: differential equation with delay, upper and lower solutions, monotone iterative technique, periodic solution

CLC Number: 

  • O175.15