四阶四点奇异边值问题的可解性

利用Leray-Sachuder原理研究了一类四阶四点边值问题:{u(4)(t)+f(t,u(t),u″(t)=0,t∈(0,1);u(0) = 0,u(1) = au(η),u″(0) = 0,u(1) = bu(ξ).其中,η,ξ∈0,1],a,b≥0且满足0≤aη≤1,0≤bξ≤1,得到其解的存在性,放宽利用上下解时对函数f(t,u,v)单调性的限制,并且在t=0或t=1有奇异性.

Solvability for fourth-order four-point singular boundary value problem

This paper discusses a fourth-order four-point boundary value problem where and .the existence of soution is obtained by using Leray-Schauder theorem , need not be monotone as upper and lower method, and may be singular at or .