利用算子方程的一些抽象结果来讨论四阶奇异边值问题.在非线性项f满足一定备件时,得到λ∈E(0,+∞),使得当λ∈E(0,λ)时,问题至少有两个正解;当λ=λ时,至少有一个正解;λ〉λ时,没有正解.
By some abstract results of operator equation ,the fourth order singular boundary value problem was discussed. Under certain conditions on f(t,u),we find λ〉0 such that the problem has at least two positive solutions for λ∈ (0,λ ),at least one positive solution for λ=λ ,and no positive solutions for λ〉λ.