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Riesz bases of exponentials and sine-type functions

✍ Scribed by S. A. Avdonin; I. Joó


Publisher
Akadmiai Kiad
Year
1988
Tongue
English
Weight
565 KB
Volume
51
Category
Article
ISSN
1588-2632

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A Note on Riesz Bases of Eigenvectors of
✍ Joseph Lutgen 📂 Article 📅 2001 🏛 Elsevier Science 🌐 English ⚖ 135 KB

## Operator-valued functions of the form compact-valued and holomorphic on certain domains ⍀ ; ‫ރ‬ are considered in separable Hilbert space. Assuming that the resolvent of A is compact, its eigenvalues are simple and the corresponding eigenvectors form a Riesz basis for H H of finite defect, it i