Sufficiency of condition (Ψ) for local solvability in two dimensions

@article{Lerner1988SufficiencyOC,
  title={Sufficiency of condition ($\Psi$) for local solvability in two dimensions},
  author={Nicolas Lerner},
  journal={Annals of Mathematics},
  year={1988},
  volume={128},
  pages={243-258}
}
  • N. Lerner
  • Published 1 September 1988
  • Mathematics
  • Annals of Mathematics
On etablit l'existence de solutions locales de l'equation Pu=f ou P est un operateur pseudodifferentiel classique a 2 dimensions de type principal, d'ordre m qui satisfait la condition (Ψ): la partie imaginaire p 2 du symbole principal de P ne change pas de signe de − a + le long d'une bicaracteristique orientee de la partie reelle p 1 du symbole principal 
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35 Citations

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