摘要
应用迭代法研究四阶三点边值问题u^((4))(t)=f(t,u(t)),t∈[0,1],u′(0)=u″(η)=u'''(0)=u(1)=0的可解性,得到了该问题正解的存在性.其中f:[0,1]×[0,+∞)→[0,+∞)连续,η∈[3^(1/2)/3,1]为常数.在格林函数变号的情形下,仍可获得该问题正解的存在性定理,并且此解是单调递减的,使得该问题正解的存在性不再局限于格林函数是正的.
We applied iterative method to study the solutions for a fourth-order three-point boundary value problems, and obtained the existence of positive solutions of the problem u-(4)(t)=f(t,u(t)),t∈[0,1],u′(0)=u″(η)=u'''(0)=u(1)=0 where f:[0,1]×[0,+∞)→[0,+∞) is continuous, η∈[√3/3,1] is a constant. In the case of sign-changing Green's function, the existence theorem of positive solution of this problem can be obtained, and the solution is monotonically decreasing, the existence of the positive solution of this problem is no longer limited to the positive Green's function.
出处
《吉林大学学报(理学版)》
CAS
CSCD
北大核心
2016年第4期695-699,共5页
Journal of Jilin University:Science Edition
基金
国家自然科学基金(批准号:11561063)
关键词
四阶三点边值问题
正解
迭代法
fourth-order three-point boundary value problem
positive solution
iterative method