Liouville properties of fully nonlinear possibly degenerate elliptic operators and some applications.

Martino Bardi (Padova, Italy)

I will present a joint paper with Annalisa Cesaroni (Padova). We prove some Liouville properties for sub- and supersolutions of fully nonlinear degenerate elliptic equations in the whole space. Our assumptions allow the coefficients of the first order terms to be large at infinity, provided they have an appropriate sign, as in Ornstein-Uhlenbeck operators. We give two applications. The first is a stabilization property for large times of solutions to fully nonlinear parabolic equations. The second is the solvability of an ergodic Hamilton-Jacobi-Bellman equation that identifies a unique critical value of the operator.

Back to Programme