Infinitely many solutions for sublinear indefinite nonlocal elliptic equations perturbed from symmetry

This paper is concerned the existence of infinitely many solutions for perturbed sublinear indefinite elliptic equations involving the nonlocal operator. By using a variant of Rabinowitz's perturbation method, we study the effect of high order non-odd perturbations which break the symmetry of the associated energy functional and show how a sequence of small negative energy solutions persists under broken symmetry situations.