The Harnack estimate for the Yamabe flow on CR manifolds of dimension 3
arXiv:math/0003197
Abstract
We deform the contact form by the amount of the Tanaka-Webster curvature on a closed spherical three-manifold. We show that if a contact form evolves with free torsion and positive Tanaka-Webster curvature as initial data, then a certain Harnack inequality for the Tanaka-Webster curvature holds.
13 pages