Nash and log-Sobolev inequalities for hypoelliptic operators

被引:6
|
作者
Wang, Feng-Yu [1 ,2 ,3 ]
机构
[1] Beijing Normal Univ, Sch Math Sci, Beijing 100875, Peoples R China
[2] Swansea Univ, Dept Math, Swansea SA2 8PP, W Glam, Wales
[3] Beijing Normal Univ, Lab Math & Complex Syst, Beijing 100875, Peoples R China
基金
中国国家自然科学基金;
关键词
58J65; 58J50;
D O I
10.1007/s00229-008-0235-2
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
By estimating the intrinsic distance and using known heat kernel upper bounds, the global Nash inequality with exact dimension is established for a class of square fields with algebraic growth induced by vector fields satisfying the Hormander condition. As an application, a sufficient condition is presented for the log-Sobolev inequality to hold. Typical examples for Gruschin type operators and generalized Kohn-Lapacians on Heisenberg groups are provided.
引用
收藏
页码:343 / 358
页数:16
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