Liouville type theorems for φ-subharmonic functions

In this paper we presents some Liouville type theorems for solutions of differential inequalities involving the φ-Laplacian. Our results, in particular, improve and generalize known results for the Laplacian and the p-Laplacian, and are new even in these cases. PhragmenLindeloff type results, and a weak form of the Omori-Yau maximum principle are also discussed.