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math.FA2024
Method of similar operators in harmonious Banach spaces
Anatoly G. Baskakov, Ilya A. Krishtal, Natalia B. Uskova
We consider similarity transformations of a perturbed linear operator in a complex Banach space , where the unperturbed operator is a generator of a Banach $…
math.FA2018
Similarity Techniques in the Spectral Analysis of Perturbed Operator Matrices
Anatoly G. Baskakov, Ilya A. Krishtal, Natalia B. Uskova
We develop the method of similar operators to study the spectral properties of unbounded perturbed linear operators that can be represented by matrices of various kinds. The class…