On the Dirichlet problem for a class of fully nonlinear elliptic equations

Based on the asymptotic property of the level hypersurfaces of f, we show that the solvability of Dirichlet problem for the fully nonlinear elliptic equation with Gamma=Gamma n is closely related to the existence of a C-subsolution introduced by Szekelyhidi (J Differ Geom 109: 337-378, 2018) of a rescaled equation. For the complex Monge-Ampere equation and complex Hessian equations the gradient estimate established in previous works (Bocki, Math Ann 344: 317-327, 2009; Hanani, J Funct Anal 137: 49-75, 1996; Guan and Li, Adv Math 225: 1185-1223, 2010; Zhang, Int Math Res Not 2010: 3814-3836, 2010) also follows as a consequence of our argument. Also, the existence and regularity of admissible solutions to Dirichlet problem for fully nonlinear elliptic equations on compact Kahler manifolds of nonnegative orthogonal bisectional curvature are obtained.