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JOURNALS
// Doklady Akademii Nauk
// Archive
Dokl. Akad. Nauk SSSR,
1964
Volume 158,
Number 5,
Pages
1042–1043
(Mi dan30218)
MATHEMATICS
On the spectrum of normal operators and perturbations of them
Karl-Peter Hadeler
Institute of Applied Mathematics, University of Hamburg
Presented:
L. S. Pontryagin
Received: 27.04.1964
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Steklov Math. Inst. of RAS
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