Mathematics – Differential Geometry
Scientific paper
2000-03-29
Annals of Global Analysis and Geometry, 21(2002), 111-121.
Mathematics
Differential Geometry
13 pages
Scientific paper
We deform the contact form by the amount of the Tanaka-Webster curvature on a
closed spherical $CR$ 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.
Chang Shu-Cheng
Cheng Jih-Hsin
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