Ergodic pairs for degenerate pseudo Pucci's fully nonlinear operators

We study the ergodic problem for fully nonlinear elliptic operators $F( \nabla u, D^2 u)$ which may be degenerate when at least one of the components of the gradient vanishes. We extend here the results in the celebrated paper of Lasry and Lions, the ones of Leonori and Porretta Capuzzo Dolcetta Leoni and Porretta, Birindelli et al.