On the essential spectrum of hypoellipti
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Ernesto Buzano; Andrea Ziggioto
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Article
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2008
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John Wiley and Sons
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English
β 239 KB
## Abstract We describe the essential spectrum of a hypoelliptic pseudoβdifferential operator which is the sum of a constantcoefficients operator and an operator with coefficients vanishing at infinity. (Β© 2007 WILEYβVCH Verlag GmbH & Co. KGaA, Weinheim)