Parametrices for a class of P.D. operators and applications
C. Parenti, L. Rodino (1983)
Banach Center Publications
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Displaying similar documents to “Hypoelliptic differential operators”
Parametrices for a class of P.D. operators and applications
and Hölder estimates for pseudodifferential operators : sufficient conditions
Richard Beals (1979)
Annales de l'institut Fourier
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Continuity in spaces and spaces of Hölder type is proved for pseudodifferential operators of order zero, under general conditions on the class of symbols. Applications to the regularity theory of some hypoelliptic operators are outlined.
On hypoelliptic operators with double characteristics
A. Menikoff (1977)
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
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Fourier integral operators in SG classes. I: Composition theorems and action on SG Sobolev spaces.
Coriasco, S. (1999)
Rendiconti del Seminario Matematico
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Hypoelliptic operators with double characteristics
A. Menikoff (1976-1977)
Séminaire Équations aux dérivées partielles (Polytechnique)
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Hölder estimates and hypoellipticity
André Unterberger, Julianne Unterberger (1976)
Annales de l'institut Fourier
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The aim of this paper is to show how, in order to prove regularity theorems, Hölder estimates, i.e. estimates involving products of powers of different semi-norms, can be used as well as standard estimates, and may in some instances be casier to prove.