... C. Li, “The existence of infinitely many solutions of a class of nonlinear elliptic equations withNeumann boundary condition for both resonance and oscillation problems,” Nonlinear Analysis:Theory, ... ArticleMultiple Solutions of p-Laplacian withNeumann and Robin Boundary Conditions for Both Resonance and Oscillation ProblemJing Zhang and Xiaoping XueDepartment of Mathematics, Harbin Institute of Technology, ... points of J.Now, we construct the sub-sup solutions of p2. It is easy to see that M1is a constantsup-solution of p2 and −M2is a constant subsolution. Moreover, we consider εϕ1for...