Principal Currents for a Pair of Unitary Operators
( Memoirs of the American Mathematical Society )
Publication series ：Memoirs of the American Mathematical Society
Author： Joel D. Pincus
Publisher： American Mathematical Society
Publication year： 2013
E-ISBN: 9781470400996
P-ISBN(Paperback): 9780821826096
Subject： O177.1 Hilbert space and linear operator theory
Keyword： Analysis
Language： ENG
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Principal Currents for a Pair of Unitary Operators
Description
Principal currents were invented to provide a noncommutative spectral theory in which there is still significant localization. These currents are often integral and are associated with a vector field and an integer-valued weight which plays the role of a multi-operator index. The study of principal currents involves scattering theory, new geometry associated with operator algebras, defect spaces associated with Wiener-Hopf and other integral operators, and the dilation theory of contraction operators. This monograph explores the metric geometry of such currents for a pair of unitary operators and certain associated contraction operators. Applications to Toeplitz, singular integral, and differential operators are included.