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Global Hypoellipticity and Simultaneous Approximability

✍ Scribed by A.Alexandrou Himonas; Gerson Petronilho

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
148 KB
Volume
170
Category
Article
ISSN
0022-1236

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πŸ“œ SIMILAR VOLUMES

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## Abstract It is proved that a class of sub‐Laplacians on the 3‐dimensional torus is globally analytic, Gevrey and __C__^∞^ hypoelliptic if and only if either a Diophantine condition holds or there is a point of finite type for the vector fields defining the operator under consideration. This work

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In this article we continue with the study of multivariate smooth general singular integral operators over R N , N β‰₯ 1, regarding their simultaneous global smoothness preservation property with respect to the L p norm, 1 ≀ p ≀ ∞, by involving multivariate higher order moduli of smoothness. Also we s

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