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Propagation des singularités pour les opérateurs différentiels de type principal localement résolubles à coefficients analytiques en dimension 2

Paul Godin — 1979

Annales de l'institut Fourier

Sur une variété analytique paracompacte de dimension 2, on considère un opérateur différentiel P à symbole principal p m analytique vérifiant la condition ( 𝒫 ) de Nirenberg et Treves. En ajoutant une nouvelle variable et en utilisant des estimations de type Carleman, on montre qu’il y a propagation des singularités pour P , dans p m - 1 ( 0 ) , le long des feuilles intégrales du système différentiel engendré par les champs hamiltoniens de Re p m et Im p m .

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