文献类型：期刊文献

英文题名：On positive periodic solutions of second order singular equations

作者：Wang, Yunhai Ru, Yuanfang

第一作者：王云海

通信作者：Ru, YF[1]

机构：[1]Guizhou Inst Technol, Sch Mech Engn, Guiyang, Guizhou, Peoples R China;[2]China Pharmaceut Univ, Coll Sci, Nanjing, Jiangsu, Peoples R China

第一机构：贵州理工学院机械工程学院

通信机构：corresponding author), China Pharmaceut Univ, Coll Sci, Nanjing, Jiangsu, Peoples R China.

年份：2018

卷号：2018

期号：1

外文期刊名：BOUNDARY VALUE PROBLEMS

收录：;Scopus(收录号：2-s2.0-85050386872);WOS:【SCI-EXPANDED(收录号:WOS:000439647000001)】；

基金：The authors were supported by NNSF of China (No. 11501165), the projects of Guizhou Provincial Science and Technology Fund (QKH-JICHU [2017], Grant no. 1408, QKH-LH [2014], Grant no. 7366).

语种：英文

外文关键词：Periodic solutions; Second order differential equations; Singular; Fixed point theorem

摘要：Using the fixed point theorem, we study the existence and multiplicity of positive periodic solutions for the second order differential equations {(x) over dot + a(t)x = f(x), x(0) = x(T), (x)over dot(0) = (x)over dot (T) For given nonnegative constants 0 < beta 1 < beta(2) < center dot center dot center dot < beta(N), the function f may be singular at x = beta(i).