EXISTENCE OF TWO PERIODIC SOLUTIONS TO n-DIMENSIONAL NEUTRAL FUNCTIONAL DIFFERENTIAL SYSTEM

• 来源期刊: 微分方程年刊（英文版）
• 关键词: neutral functional differential systems periodic solution multiplicity fixed point theorem
• 年，卷（期）: 2009,（2）
• 页码范围: 140-149
• 页数: 10页
• 语种: 英文

摘要

In this paper, some sufficient criteria for the existence and the multiplicity of positive periodic solutions to a class of first-order n-dimensional neutral functional differential system are established. Our main results generalize related studies in the previous literatures. The fixed point theorem in cones is required to prove our results.