2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/74816In this paper, we prove a Morse index theorem for the index form of even order linear Hamiltonian systems on the closed interval with reasonable self-adjoint boundary conditions. The highest order term is assumed to be nondegenerate.36 pagesDifferential GeometryFunctional Analysis58E10;53E05text