A remark on sums of squares of complex vector fields

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dc.creatorChrist, Michael
dc.date2005-03-23
dc.date.accessioned2026-07-07T05:18:17Z
dc.date.available2026-07-07T05:18:17Z
dc.descriptionThis note is a comment on a recent paper by J. J. Kohn. We give an example of a second order partial differential operator, expressed as a sum of squares of complex vector fields satisfying the bracket condition, that is not hypoelliptic.
dc.description5 pages
dc.identifierhttps://arxiv.org/abs/math/0503506
dc.identifierhttp://arxiv.org/abs/math/0503506
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/74609
dc.subjectComplex Variables
dc.subjectAnalysis of PDEs
dc.subject35H10; 32W10
dc.titleA remark on sums of squares of complex vector fields
dc.typetext

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