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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.
Neil S. Trudinger (1973)
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
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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.
L. Nirenberg (1959)
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
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Nicholas Th. Varopoulos (1993)
Revista Matemática Iberoamericana
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This is the second instalment of my previous paper with the same title, [1]. This paper consists of two different parts. The first part is devoted to improvements of the results developed in [1]. These improvements are described in section 0.1 below and developed in sections 1 to 5, and 9 to 10; they are in fact technically distinct from [1] and rely on a systematic use of microlocalisation in the context of Hörmander-Weyl calculus. These paragraphs can therefore be read quite independently...
Tidriri, Moulay D. (2001)
Abstract and Applied Analysis
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Charles L. Fefferman, Joseph J. Kohn (1988)
Revista Matemática Iberoamericana
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