Positive solutions for second order four-point boundary value problems at resonance

Chunfang Shen, Liu Yang, Yan Liang

Abstract


Using Leggett-Williams norm-type theorem due to D. O'Regan and M. Zima,
we establish the existence of positive solution for a class of second-order
four point boundary value problem under different resonance conditions.
An example is given to illustrate the main results.

Keywords


Four-point boundary value problem; resonance; positive solution; cone; fixed point

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