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Caractérisation des opérateurs hypoelliptiques homogenes invariants à gauche sur un groupe de Lie nilpotent gradue. (French) Zbl 0423.35040


MSC:

35H10 Hypoelliptic equations
22E25 Nilpotent and solvable Lie groups
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References:

[1] Beals R., Exposé aux journles E.D.P. de St jean de Monts
[2] Helffer B., Hypoellipticit6 pour des op6rateurs diffgrentiels surles groupes de Lie nilpotents (1977)
[3] Helffer B., S6minaire Goulaouic-Schwartz pp 77–
[4] Helffer A ., in p.d.e. 3 (1978)
[5] Kirillov A.A., Hat. Nauk. 17 pp 57– (1962)
[6] Lion G. en prgparation
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[9] Rothschild L. P., Acta Mathenatica 137 pp 248–
[10] Vergne M., C.R. Acad. Sc. 270, (1970) 270 pp 173– (1970)
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