摘要
考虑如下边值问题-u"=λ2u+αf(u)+g(|u'|)(1)u(0)=u(1)=0(2)正解的存在性,其中λ>0,α≥0为参数;f∈C(R,R+),g∈C(R+,R+),满足g(s)>0,在上述条件下,我们证明了,对任一0<λ<π,α≥0,边值问题(1)-(2)至少存在一个正解,对λ≥π,边值问题(1)-(2)没有正解。
Considering the boundary value problem-u″=λ^2u+αf(u)+g(|u'|) (1)u(0)=u(1)=0 (2)where λ〉0,α≥0 are parameters; f∈C(R,R+),g∈C(R+,R+)and they satisfy the following conditions: g(s)〉0,Vs〉0,lim→0f(s)/s=0,lims→0g(s)/s=0,∫∞sds/α+g(s)=∞,α〉0,∫ds/g(s)〈∞. We proved that, for 0〈λ〈π,α≥0,the boundary value problem(1)-(2) has at least one positive solution; for λ≥ττ, the boundary problem(1)-(2)has no positive solution.
出处
《闽江学院学报》
2005年第5期1-4,共4页
Journal of Minjiang University
基金
福建省自然科学基金资助课题[J0511015]
关键词
微分方程
边值问题
初值问题
正解
Differential equation
Boundary value problem
Positive solution