Infinitely many homoclinic solutions for second order Hamiltonian systems Original Research Article

In this paper we study the existence of infinitely many homoclinic solutions for second order Hamiltonian systems View the MathML sourceü−L(t)u+Wu(t,u)=0, View the MathML source∀t∈R, where L(t)L(t) is unnecessarily positive definite for all t∈Rt∈R, and W(t,u)W(t,u) is of subquadratic growth as |u|→∞|u|→∞.