Hypoellipticity and loss of derivatives with Appendix Analyticity and loss of derivatives

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dc.creatorKohn, Joseph J.
dc.creatorDerridj, Makhlouf
dc.creatorTartakoff, David S.
dc.date2006-01-26
dc.date.accessioned2026-07-07T06:59:20Z
dc.date.available2026-07-07T06:59:20Z
dc.descriptionFor each value of k, two complex vector fields satisfying the bracket condition are exhibited the sum of whose squares is hypoelliptic but not subelliptic - in fact the operator loses k-1 derivatives in Sobolev norms. In the Appendix it is proven that this operator is analytic hypoelliptic.
dc.description44 pages including appendix
dc.identifierhttps://arxiv.org/abs/math/0601646
dc.identifierhttp://arxiv.org/abs/math/0601646
dc.identifierAnnals of Mathematics vol. 162 no. 2, September 2005, pp. 943-986
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/107709
dc.subjectAnalysis of PDEs
dc.subject35H10, 35N15
dc.titleHypoellipticity and loss of derivatives with Appendix Analyticity and loss of derivatives
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