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一类非线性变号三点边值问题正解的存在性
引用本文:魏嘉,杨建辉.一类非线性变号三点边值问题正解的存在性[J].重庆师范学院学报,2013(6):77-80.
作者姓名:魏嘉  杨建辉
作者单位:[1]甘肃联合大学师范学院,兰州730000 [2]周口师范学院数学与信息科学学院,河南周口466001
基金项目:甘肃省自然科学基金项目(No.3ZS042-B26-021);甘肃省教育厅科研项目(No.1013B-03)
摘    要:考虑非线性变号二阶三点边值问题u″+h(t) f (u (t ))=0,t∈ 0,1],u(0) =αu′(0),u(1) =βu(η),其中α≥0,0〈β〈1,η∈ (0, 1),h(t )≥0,t∈ 0, η],h(t )≤0,t∈ η, 1]。通过运用锥上的Guo-Krasnoselskii’s不动点定理研究了上述边值问题至少2个正解的存在性。

关 键 词:变号  三点边值问题  格林函数  正解  存在性

The Existence of Positive Solutions for Nonlinear Three-point Boundary Value Problem with Change of Sign
WEI Jia,YANG Jian-hui.The Existence of Positive Solutions for Nonlinear Three-point Boundary Value Problem with Change of Sign[J].Journal of Chongqing Normal University(Natural Science Edition),2013(6):77-80.
Authors:WEI Jia  YANG Jian-hui
Institution:1. School of Normal, Gansu Lianhe University, Lanzhou 730000;2. College of Mathematics and Information Science, Zhoukou Normal University, Zhoukou Henan 466001, China)
Abstract:This paper is concerned the following nonlinear second order three-point boundary value problemu "+h(t) f (u (t ))=0,t∈ 0,1],u(0) =αu′(0),u(1) =βu(η),where α≥0,0〈β〈1,η∈ (0, 1),h(t )≥0,t∈ 0, η],h(t )≤0,t∈ η, 1]The existence of two positive solutions at least are established by using the well-known Guo-Krasnoselskii' s fixed-point theorem in cones.
Keywords:sign changing  three-point boundary value problem  Green's function  positive solution  existence
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