A NEW PROOF OF OKAJI'S THEOREM FOR A CLASS OF SUM OF SQUARES OPERATORS

dc.creatorCORDARO, Paulo D.
dc.creatorHANGES, Nicholas
dc.date.accessioned2012-04-19T15:45:01Z
dc.date.accessioned2018-07-04T14:43:13Z
dc.date.available2012-04-19T15:45:01Z
dc.date.available2018-07-04T14:43:13Z
dc.date.created2012-04-19T15:45:01Z
dc.date.issued2009
dc.identifierANNALES DE L INSTITUT FOURIER, v.59, n.2, p.595-619, 2009
dc.identifier0373-0956
dc.identifierhttp://producao.usp.br/handle/BDPI/16686
dc.identifierhttp://aif.cedram.org/cedram-bin/article/AIF_2009__59_2_595_0.pdf
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1613507
dc.description.abstractLet P be a linear partial differential operator with analytic coefficients. We assume that P is of the form ""sum of squares"", satisfying Hormander's bracket condition. Let q be a characteristic point; for P. We assume that q lies on a symplectic Poisson stratum of codimension two. General results of Okaji Show that P is analytic hypoelliptic at q. Hence Okaji has established the validity of Treves' conjecture in the codimension two case. Our goal here is to give a simple, self-contained proof of this fact.
dc.languageeng
dc.publisherANNALES INST FOURIER
dc.relationAnnales de l Institut Fourier
dc.rightsCopyright ANNALES INST FOURIER
dc.rightsopenAccess
dc.subjectAnalytic hypoelliptic
dc.subjectsum of squares
dc.titleA NEW PROOF OF OKAJI'S THEOREM FOR A CLASS OF SUM OF SQUARES OPERATORS
dc.typeArtículos de revistas


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