TY - JOUR T1 - Submanifolds in Cauchy Riemann Geometry AU - Cheng , Jih-Hsin JO - Journal of Mathematical Study VL - 4 SP - 471 EP - 492 PY - 2020 DA - 2020/12 SN - 53 DO - http://doi.org/10.4208/jms.v53n4.20.04 UR - https://global-sci.org/intro/article_detail/jms/18511.html KW - Heisenberg group, umbilicity, Pansu sphere, Strong maximum principle, horizontal ($p$−)mean curvature, subriemannian manifold, CR geometry, chain, Kropina metric, pseudohermitian geometry, CR invariant surface area functional, singular Yamabe problem, volume renormalization. AB -

In this paper I would like to make a report on the results about hypersurfaces in the Heisenberg group and invariant curves and surfaces in CR geometry. The results are contained in the papers [8, 9, 16] and [14]. Besides, I would also report on the results about the strong maximum principle for a class of mean curvature type operators in [10].