COMPLEX VECTOR FIELDS AND HYPOELLIPTIC PARTIAL DIFFERENTIAL OPERATORS

被引:5
|
作者
Altomani, Andrea [1 ]
Hill, C. Denson [2 ]
Nacinovich, Mauro [3 ]
Porten, Egmont [4 ]
机构
[1] Univ Luxembourg, Res Unity Math, L-1511 Luxembourg, Luxembourg
[2] SUNY Stony Brook, Dept Math, Stony Brook, NY 11794 USA
[3] II Univ Roma Tor Vergata, Dipartimento Matemat, I-00133 Rome, Italy
[4] Mid Sweden Univ, Dept Math, S-85170 Sundsvall, Sweden
关键词
Complex distribution; subelliptic estimate; hypoellipticity; Levi form; CR manifold; pseudoconcavity; flag manifold; CR MANIFOLDS; DERIVATIVES;
D O I
10.5802/aif.2545
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
We prove a subelliptic estimate for systems of complex vector fields under some assumptions that generalize the essential pseudoconcavity for CR manifolds, that was first introduced by two of the authors; and the Hormander's bracket condition for real vector fields. Applications are given to prove the hypoellipticity of first order systems and second order partial differential operators. Finally we describe a class of compact homogeneous CR manifolds for which the distribution of (0,1) vector fields satisfies a subelliptic estimate.
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页码:987 / 1034
页数:48
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