Integral Volume Criteria for Semilinear and Quasilinear Liouville Theorems on Complete Manifolds

Let $M$ be a connected complete noncompact Riemannian manifold without boundary, and let $V_o(R)$ denote its ball volume. We prove Liouville theorems without any curvature assumption. For $p>1$ and $q>p-1$, divergence of $\int^\infty R^{pq/(p-1)-1}V_o(R)^{-(q-p+1)/(p-1)}\dd R$ forces every nonnegati