Three periodic solutions to an eigenvalue problem for a class ofsecond-order Hamiltonian systems

[摘要] We establish a multiplicity result to an eigenvalueproblem related to second-order Hamiltonian systems. Under newassumptions, we prove the existence of an open interval ofpositive eigenvalues in which the problemadmits three distinct periodic solutions.

[学科分类] 数学（综合）