InhaltsangabeIntegral criteria for Hölder continuity.- Regularity for linear elliptic equations and quasilinear systems.- Regularity for Monge-Ampère equations.- Function theory of elliptic equations.- Univalent solutions of binary elliptic systems.- Conformal mappings with respect to a Riemannian metric.- Local behavior of solutions of differential inequalities.- Univalent solutions of Heinz-Lewy type systems.- A priori estimates for Monge-Ampère equations.- Regularity and a priori estimates for locally convex surfaces.