Sharp Schauder estimates for some degenerate Kolmogorov equations

• Paul-Éric Chaudru de Raynal ^[1] ; Igor Honoré ^[2] ; Stéphane Menozzi ^[2]
  1. [1] University of Savoy

     University of Savoy

     Arrondissement de Chambéry, Francia

     
  2. [2] University of Évry Val d'Essonne

     University of Évry Val d'Essonne

     Arrondissement d'Évry, Francia

     
• Localización: Annali della Scuola Normale Superiore di Pisa. Classe di scienze, ISSN 0391-173X, Vol. 22, Nº 3, 2021, págs. 989-1090
• Idioma: inglés
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• Resumen

  • We provide some sharp Schauder estimates for degenerate PDEs of Kolmogorov type when the coefficients lie in some suitable anisotropic H ̈older spaces and the first-order term is non-linear and unbounded. We proceed through a perturbative approach based on forward parametrix expansions.

    Due to the low regularizing properties of the degenerate variables, for the procedure to work, we heavily exploit duality results between appropriate Besov spaces.

    Our method can be seen as constructive and provides, even in the non- degenerate case, an alternative approach to Schauder estimates.