A positive solution for singular discrete boundary value problems with sign-changing nonlinearities

[摘要] This paper presents new existence results for the singulardiscrete boundary value problem−Δ2u(k−1)=g(k,u(k))+λh(k,u(k)),k∈[1,T],u(0)=0=u(T+1). In particular, ournonlinearity may be singular in its dependent variable and isallowed to change sign.

[学科分类] 应用数学