Existence of Positive Periodic Solutions for Neutral Functional Differential Equations

نویسندگان

  • ZHIXIANG LI
  • XIAO WANG
چکیده

We find sufficient conditions for the existence of positive periodic solutions of two kinds of neutral differential equations. Using Krasnoselskii’s fixed-point theorem in cones, we obtain results that extend and improve previous results. These results are useful mostly when applied to neutral equations with delay in bio-mathematics.

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تاریخ انتشار 2012