2010/11/3 吳進通教授專題演講
演講者：
單 位：
日 期：2010年11月3日 PM 14:30
地 點：國立高雄大學理學院408室
講 題：
摘 要：
In this talk, first we can obtain a sharp lower-bound estimate for the first nonzero eigenvalue of the Kohn Laplacian (and the Sublaplacian) in a closed pseudohermitian (2n+1)-manifold M. Secondly, we show that when a sharp lower-bound estimate is achieved, then M will be the standard pseudohermitian (2n+1)-sphere under some suitable curvature conditions on covariant derivatives of pseudohermitian torsion. This work is joint with Prof. Shu-Cheng Chang.