The existence and the uniqueness of symmetric positive solutions for a fourth-order boundary value problem

  • Authors:
  • Chengbo Zhai;Ruipeng Song;Qianqian Han

  • Affiliations:
  • -;-;-

  • Venue:
  • Computers & Mathematics with Applications
  • Year:
  • 2011

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Abstract

The purpose of this paper is to investigate the existence and the uniqueness of symmetric positive solutions for a class of fourth-order boundary value problem: {y^(^4^)(t)=f(t,y(t)),t@?[0,1],y(0)=y(1)=y^'(0)=y^'(1)=0. By using the fixed point index method, we establish the existence of at least one or at least two symmetric positive solutions for the above boundary value problem. Further, by using a fixed point theorem of general @a-concave operators, we also present criteria which guarantee the existence and uniqueness of symmetric positive solutions for the above boundary value problem.