Acta mathematica scientia,Series A ›› 2010, Vol. 30 ›› Issue (3): 730-742.

• Articles • Previous Articles     Next Articles

Positive Periodic Solutions of Neutral Functional Differential Equations with State Dependent Delays on Time Scales

 LI Yong-Kun, ZHANG Hong-Tao   

  1. Department of Mathematics, Yunnan University, |Kunming 650091
  • Received:2007-12-10 Revised:2009-10-22 Online:2010-05-25 Published:2010-05-25
  • Supported by:

    国家自然科学基金 (10971183)资助

Abstract:

By using a fixed point theorem on strict-set-contraction, some sufficient conditions  are obtained for the existence of positive periodic solutions for a periodic neutral functional differential equation on time scales of the form
xΔ(t)=x(t)[r(t)-a(t)x(t)-∑nj=1aj(t) x(t-τj(t, x(t)))-∑nj=1cj(t) xΔ(t-σj(t, x(t)))g ],
where r, a, aj, cC( T, R+)(j =1, 2, … , n) are ω -periodic functions, and τj, σC( T×R, T)(j =1, 2, … , n) are ω -periodic functions with respect to their first arguments, respectively.

Key words: Positive periodic solution, Neutral functional differential equation, Time scales,  Strict-set-contraction

CLC Number: 

  • 34K13
Trendmd