%0 Journal Article
%A Azagra Rueda, Daniel
%A Ferrera Cuesta, Juan
%A Sanz Alonso, Beatriz
%T Viscosity solutions to second order partial differential equations on Riemannian manifolds
%D 2008
%@ 0022-0396
%U https://hdl.handle.net/20.500.14352/49815
%X We prove comparison, uniqueness and existence results for viscosity solutions to a wide class of fully nonlinear second order partial differential equations F(x, u, du, d(2)u) = 0 defined on a finite-dimensional Riemannian manifold M. Finest results (with hypothesis that require the function F to be degenerate elliptic, that is nonincreasing in the second order derivative variable, and uniformly continuous with respect to the variable x) are obtained under the assumption that M has nonnegative sectional curvature, while, if one additionally requires F to depend on d2u in a uniformly continuous manner, then comparison results are established with no restrictive assumptions on curvature.
%~