Existence and multiplicity of solutions for fourth-order boundary value problems with three parameters

This paper is concerned with the existence and multiplicity of the solutions for the fourth-order boundary value problem u(4)(t)+ηu″(t)−ζu(t)=λf(t,u(t))u(4)(t)+ηu″(t)−ζu(t)=λf(t,u(t)), 0