C∞ regularity of solutions of the Levi equation

Annales de l'Institut Henri Poincare (C) Analyse Non Lineaire

Volumn 15, Issue 4, 1998, Pages 517-534

  Citti, G ^a  

^a UNIVERSITY OF BOLOGNA   (Italy)

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Indexed keywords

EID: 0001535193     PISSN: 02941449     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0294-1449(98)80033-4     Document Type: Article

References (10)

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3. 2n+1, preprint.
4. G. B. FOLLAND, Subelliptic estimates and function on nilpotent Lie groups, Arkiv f. Mat., Vol. 13, 1975, pp. 161-207.
5. 6 Complex and Analysis on the Heisenberg Group, Comm. Pure Appl. Math., Vol. 20, 1974, pp. 429-522.
6. A. NAGEL, E. M. STEIN and S. WAINGER, Balls and metrics defined by vector fields I: Basic properties, Acta Math., Vol. 155, 1985, pp. 103-147.
7. L. ROTHSCHILD and E. M. STEIN, Hypoelliptic differential operators and nihilpotent Lie groups, Acta Math., Vol. 137, 1977, pp. 247-320.
8. Z. SLODKOWSKI and G. TOMASSINI, Weak solutions for the Levi equation and Envelope of Holomorphy, J. Funct. Anal., Vol. 101, no. 4, 1991, pp. 392-407.
9. G. TOMASSINI, Geometric Properties of Solutions of the Levi Equation, Ann. di Mat. Pura e Appl, Vol. 152, 1988, pp. 331-344.
10. C. J. Xu, Regularity for quasilinear Second order Subelliptic Equations, Comm. Pure Appl. Math., Vol. 45, 1992, pp. 77-96.