Upper and lower solution method for fourth-order four-point boundary value problems
Journal of Computational and Applied Mathematics
| Hi-index | 7.29 |
In this paper, we consider a fourth-order boundary value problem with impulse. First, we establish criteria for the existence of one or more than one positive solution of a non-eigenvalue problem. Second, we are concerned with determining values of @l, for which there exist positive solutions for an eigenvalue problem. In both problems, we shall use the Krasnoselskii fixed point theorem.