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Curvature estimates for Weingarten hypersurfaces in Riemannian manifolds

Abstract We prove curvature estimates for general curvature functions. As an application we show the existence of closed, strictly convex hypersurfaces with prescribed curvature F, where the defining cone of F is Γ +. F is only assumed to be monotone, symmetric, homogeneous of degree 1, concave and of class Cm,α , m ≥ 4.