On Liouville-type theorems and the uniqueness of the positive Cauchy problem for a class of hypoelliptic operators

Alessia E. Kogoj, Y. Pinchover, S. Polidoro

This note contains a representation formula for positive solutions of linear degenerate second-order equations of the form $$ \partial_t u (x,t) = \sum_{j=1}^m X_j^2 u(x,t) + X_0 u…