Hodge theory on ALG* manifolds

We develop a Fredholm theory for the Hodge Laplacian in weighted spaces on ALG* manifolds in dimension four. We then give several applications of this theory. First, we show the existence of harmonic functions with prescribed asymptotics at infinity. A corollary of this is a non-existence result for ALG* manifolds with non-negative Ricci curvature having group Gamma = {e} at infinity. Next, we prove a Hodge decomposition for the first de Rham cohomology group of an ALG* manifold. A corollary of this is vanishing of the first Betti number for any ALG* manifold with non-negative Ricci curvature. Another application of our analysis is to determine the optimal order of ALG* gravitational instantons.