Non-divergence form parabolic equations associated with non-commuting vector fields: Boundary behavior of nonnegative solutions

M. Frentz, N. Garofalo, E. Götmark +2

In a cylinder ${\Omega }_T=\Omega \times (0,T)\subset {\mathbb{R}}_{+}^{n+1}$ we study the boundary behavior of nonnegative solutions of second order parabolic equations of the form \[ Hu =\sum_{i,j=1}^ma_{…