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On the essential approximate point spectrum of operators

✍ Scribed by Vladimír Müller


Publisher
SP Birkhäuser Verlag Basel
Year
1992
Tongue
English
Weight
353 KB
Volume
15
Category
Article
ISSN
0378-620X

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On the essential spectrum of hypoellipti
✍ Ernesto Buzano; Andrea Ziggioto 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 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. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)