华南理工大学学报(自然科学版) ›› 2004, Vol. 32 ›› Issue (7): 81-85.

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具偏差变元的n 阶微分方程共轭边值问题的多解性

杨雯抒1 翁佩萱2   

  1. 1∙嘉应学院 数学系‚广东 梅州514015;2∙华南师范大学 数学系‚广东 广州510631
  • 收稿日期:2003-12-10 出版日期:2004-07-20 发布日期:2015-09-09
  • 通信作者: 杨雯抒(1964-)‚男‚讲师‚主要从事微分方程研究. E-mail: lwg1349@163.net
  • 作者简介:杨雯抒(1964-)‚男‚讲师‚主要从事微分方程研究.
  • 基金资助:
     广东省自然科学基金资助项目(011471)

Existence of Multiple Solutions to the Conjugate Boundary Value Problem of the n-th Order Differential Equation with Deviating Arguments

YangWen-shu1  Weng Pei-xuan2   

  1. 1.Dept.of Mathematics‚Jiaying College‚Meizhou514015‚Guangdong‚China;
    2.Dept.of Mathematics‚South China Normal Univ.‚Guangzhou510631‚Guangdong‚China

  • Received:2003-12-10 Online:2004-07-20 Published:2015-09-09
  • Contact: 杨雯抒(1964-)‚男‚讲师‚主要从事微分方程研究. E-mail: lwg1349@163.net
  • About author: 杨雯抒(1964-)‚男‚讲师‚主要从事微分方程研究.

摘要: 研究一类具偏差变元的(k‚n-k)共轭边值问题多个正解的存在性‚通过把所研究问题转化为相应的全连续算子的不动点问题‚利用锥上不动点指数原理和 Green 函数界的估计‚得到了此边值问题存在至少2个正解的两组充分条件.所得结果是没有偏差变元情形下常微分方程边值问题结论的拓广.算例说明所得结果的可应用性.

关键词: n 阶微分方程, 共轭边值问题, 锥上不动点指数定理, 正解

Abstract: The existence of multiple positive solutions to a class of (k‚n-k) conjugate boundary value problem of the n-th order differential equation with deviating arguments is investigated.By a transform‚the discussed problem is firstly changed into a fixed-point problem of a completely continuous operator‚and by using the fixed-point index theorem in cones and the evaluation of Green functions‚two group of sufficient conditions are then obtained to guarantee the exis-tence of two positive solutions to the problem.The results are the extension of those of the corresponding boundary val -ue problem for the ordinary differential equation without deviating argument.The applicability of the obtained theorems is proved by an examlpe at last.

Key words:  n-th order differential equation, conjugate boundary value problem, fixed-point index theorem, positive solution