Regularity of

• 作 者: WANG Wei
• 出 处: 中国科学：数学英文版
• 发表日期: 2001年4期
• 基金项目: This wore was supported by the National Natural Science Foundation of China (Grant No.10071070) .

<正>For each point ξ in a CR manifold M of codimension greater than 1, the CR structure of M can be approximated by the CR structure of a nilpotent Lie group Gξ of step two near ξ. Gξ varies with ξ. □b and b on M can be approximated by □4 and b on th