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The unbounded commutant of an operator of class C_0.

Tue, 08/18/2009 - 11:53 — SomNambul
Authors: Hari Bercovici
Subjects: Functional Analysis
link: http://arxiv.org/abs/0908.2262
Abstract

We describe the closed, densely defined linear transformations commuting with
a given operator T of class C_0 in terms of bounded operators in {T}'. Our
results extend those of Sarason for operators with defect index 1, and Martin
in the case of arbitrary finite index.

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