Boundary Behavior of Subelliptic Parabolic Equations on Time-Dependent Domains
Analysis of PDEs
2013-01-23 v1
Abstract
In this paper we study the boundary behavior of solutions of a divergence-form subelliptic heat equation in a time-varying domain \Omega in R^{n+1}, structured on a set of vector fields X = (X_1, ... X_m) with smooth coefficients satisfying H\"ormander's finite rank condition. Assuming that \Omega is an X-NTA domain, we first prove a Dahlberg type estimate comparing the X-caloric measure of \Omega and the Green function of the subelliptic heat operator. We then prove a backward Harnack inequality, the doubling property for the X-caloric measure of \Omega, the H\"older continuity at the boundary for quotients of solutions of H, and a Fatou theorem.
Keywords
Cite
@article{arxiv.1301.5176,
title = {Boundary Behavior of Subelliptic Parabolic Equations on Time-Dependent Domains},
author = {Marie Frentz and Elin Götmark},
journal= {arXiv preprint arXiv:1301.5176},
year = {2013}
}