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论文类型：期刊论文

发表时间：2013-12-01

发表刊物：PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY

收录刊物：SCIE、Scopus

卷号：141

期号：12

页面范围：4261-4274

ISSN号：0002-9939

关键字：Positive solution; Leray-Schauder alternative theorem; Kransnosel'skii fixed point theorem

摘要：In this paper, we are concerned with the existence and multiplicity of positive periodic solutions for first-order vector differential equations. By using the Leray-Schauder alternative theorem and the Kransnosel'skii fixed point theorem, we show that the differential equations under the periodic boundary value conditions have at least two positive periodic solutions.