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Zapiski Nauchnykh Seminarov LOMI, 1977, Volume 73, Pages 203–206
(Mi znsl1954)
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This article is cited in 2 scientific papers (total in 2 papers)
Short communications
Spectral measures and duality of spectral subspaces of contractions with slowly growing resolvent
Yu. P. Ginzburg
Abstract:
We consider the class $\Pi$ of contracting operators $T$ with spectrum on the unit
circle $\Gamma$, acting on a separable Hilbert space and subject to the following
restriction on the growth of the resolvent $R_T(\lambda)$:
$$
\sup_{0\leqslant\rho<1}\int^{2\pi}_0\ln^+\{(1-\rho)\|R_T(\rho e^{i\varphi})\|\}d\varphi<+\infty.
$$
We study the spectral subspaces $\Omega_T(B)$ for $T\in\Pi$, corresponding to arbitrary
Borel subsets of the circle $\Gamma$; in parallel we study a Borel measure $\omega_T(B)$ on $\Gamma$,
adequate for $\Omega_T(B)$ in the following sense:
$$
\Omega_T(B)=\{0\}\Longleftrightarrow\omega_T(B)=0.
$$
Citation:
Yu. P. Ginzburg, “Spectral measures and duality of spectral subspaces of contractions with slowly growing resolvent”, Investigations on linear operators and function theory. Part VIII, Zap. Nauchn. Sem. LOMI, 73, "Nauka", Leningrad. Otdel., Leningrad, 1977, 203–206; J. Soviet Math., 34:6 (1986), 2144–2146
Linking options:
https://www.mathnet.ru/eng/znsl1954 https://www.mathnet.ru/eng/znsl/v73/p203
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