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.