Estimates of Eigenfunctions and Localization of the Spectrum of Differential Operators
β Scribed by L.A Shuster
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 102 KB
- Volume
- 229
- Category
- Article
- ISSN
- 0022-247X
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π SIMILAR VOLUMES
HILBERT space L,(D) where the coefficients always fulfil the following conditions. ## i) ii) a@), q(z) E Cl(l2) and real-valued, a&) = a@), x E D, ( 7) Denoting the domain of the FRIEDRICHS extension A by D(A) we have W ) r H A . 5 mR"). 1) W#W) is the completion of Com(Rn) in the norm Ilullw&BT8
This paper deals with Volterra perturbations of normal operators in a separable Hilbert space. Invertibility conditions and estimates for the norm of the inverse operators are established. In addition, bounds for the spectrum are suggested. Applications to integral, integro-differential, and matrix