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浙江大学学报(理学版)  2019, Vol. 46 Issue (6): 686-690    DOI: 10.3785/j.issn.1008-9497.2019.06.010
数学与计算机科学     
带非线性边界条件的二阶奇异微分系统正解的存在性
马满堂, 贾凯军
西北师范大学 数学与统计学院,甘肃 兰州 730070
Existence of positive solutions for boundary value problems of second-order systems with nonlinear boundary conditions
MA Mantang, JIA Kaijun
College of Mathematics and Statistics, Northwest Normal University,Lanzhou 730070, China
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摘要: 研究了带非线性边界条件的二阶奇异微分系统边值问题-u=ΛG(t)F(u),0<t<1,u(0)=0,u'(1)+C(u(1))u(1)=0正解的存在性,其中u=(u1,u2,?,un)T,G(t)=diag[g1(t),g2(t),?,gn(t)],gi(t)(i=1,2,?,n)t=0处允许有奇性F(u)=(f1(u),f2(u),?,fn(u))T,C=diag(c1,c2,?,cn),Λ=diag(λ1,λ2,?,λn),λi(i=1,2,?,n)在非线性项F分别满足超线性、次线性和渐近线性的增长条件下,运用锥拉伸与压缩不动点定理获得了该问题正解的存在性结论。
关键词: 非线性边界条件系统正解存在性    
Abstract: The existence of positive solutions for boundary value problems of second-order singular differentialsystem swith nonlinear boundary conditions -u=ΛG(t)F(u),0<t<1,u(0)=0,u'(1)+C(u(1))u(1)=0 is studied,where u=(u1,u2,?,un)T,G(t)=diag[g1(t),g2(t),?,gn(t)],gi(t)(i=1,2,?,n), allows singularity at t=0,F(u)=(f1(u),f2(u),?,fn(u))T,C=diag(c1,c2,?,cn),Λ=diag(λ1,λ2,?,λn),λi(i=1,2,?,n) is a positive parameter. Under the condition that the nonlinearity term F satisfies superlinear, sublinear and asymptotically linear growth respectively, the existence of positive solutions of the problems is obtained by using the fixed-point theorem of cone expansion-compression.
Key words: nonlinear boundary conditions    systems    positive solutions    existence    cone
收稿日期: 2018-11-21 出版日期: 2019-11-25
CLC:  O175.8  
基金资助: 国家自然科学基金资助项目(11671322).
通讯作者: ORCID:http://orcid.org/0000-0001-6712-4276,E-mail:jiakaijun_nwnu@163.com.     E-mail: jiakaijun_nwnu@163.com
作者简介: 马满堂(1995—),ORCID:http://orcid.org/0000-0001-6643-0503,男,硕士研究生,主要从事常微分边值问题研究,E-mail:mantangma@163.com.
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引用本文:

马满堂, 贾凯军. 带非线性边界条件的二阶奇异微分系统正解的存在性[J]. 浙江大学学报(理学版), 2019, 46(6): 686-690.

MA Mantang, JIA Kaijun. Existence of positive solutions for boundary value problems of second-order systems with nonlinear boundary conditions. Journal of Zhejiang University (Science Edition), 2019, 46(6): 686-690.

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https://www.zjujournals.com/sci/CN/10.3785/j.issn.1008-9497.2019.06.010        https://www.zjujournals.com/sci/CN/Y2019/V46/I6/686

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