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《山东大学学报(理学版)》 ›› 2021, Vol. 56 ›› Issue (12): 52-58.doi: 10.6040/j.issn.1671-9352.0.2021.191

• • 上一篇    

一类非线性三阶三点边值问题正解的存在性、不存在性及多解性

张瑞燕   

  1. 西北师范大学数学与统计学院, 甘肃 兰州 730070
  • 发布日期:2021-11-25
  • 作者简介:张瑞燕(1996— ),女,硕士研究生,研究方向为常微分方程与动力系统. E-mail:zry1753574260@163.com
  • 基金资助:
    国家自然科学基金资助项目(12061064)

Existence, nonexistence and multiplicity of positive solutions for a class of nonlinear third order three point boundary value problems

ZHANG Rui-yan   

  1. College of Mathematics and Statistics, Northwest Normal University, Lanzhou 730070, Gansu, China
  • Published:2021-11-25

摘要: 考虑一类非线性三阶三点边值问题{u(t)+λf(t,u(t))=0, t∈[0,1],u(0)=u'(0)=0, u'(1)=αu'(η)正解的存在性、不存在性以及多解性,其中λ>0是一个参数,0<η<1, 1<α<1/η, f:[0,1]×[0,∞)→(0,∞)是一个连续函数。主要定理的证明基于不动点指数理论、Leray-Schauder度以及上下解方法。

关键词: 三阶, 多解性, 存在性, 不动点指数

Abstract: This paper considers the existence, nonexistence and multiplicity of positive solutions for a class of nonlinear third-order three-point boundary value problems {u(t)+λf(t,u(t))=0, t∈[0,1],u(0)=u'(0)=0, u'(1)=αu'(η),where λ>0 is a parameter, 0<η<1, 1<α<1/η, f:[0,1]×[0,∞)→(0,∞)is a continuous function. The proof of the main theorems is based on fixed point index theorems, Leray-Schauder degree and the method of upper and lower solutions.

Key words: third-order, multiplicity, existence, fixed-point index

中图分类号: 

  • O175.8
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