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Polynomial operators and local approximation of solutions of pseudo-differential equations on the sphere

✍ Scribed by Q. T. Le Gia; H. N. Mhaskar


Publisher
Springer-Verlag
Year
2006
Tongue
English
Weight
266 KB
Volume
103
Category
Article
ISSN
0029-599X

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On the essential spectrum of hypoellipti
✍ Ernesto Buzano; Andrea Ziggioto πŸ“‚ Article πŸ“… 2008 πŸ› John Wiley and Sons 🌐 English βš– 239 KB

## Abstract We describe the essential spectrum of a hypoelliptic pseudo‐differential operator which is the sum of a constantcoefficients operator and an operator with coefficients vanishing at infinity. (Β© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)