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What is The unbounded commutant of an operator of class C_0 about?

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.

Author

Bercovici, Hari

Published

2009

Language

EN