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A Galois Correspondence for II1 Factors and Quantum Groupoids

โœ Scribed by Dmitri Nikshych; Leonid Vainerman


Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
273 KB
Volume
178
Category
Article
ISSN
0022-1236

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โœฆ Synopsis


We establish a Galois correspondence for finite quantum groupoid actions on II 1 factors and show that every finite index and finite depth subfactor is an intermediate subalgebra of a quantum groupoid crossed product. Moreover, any such subfactor is completely and canonically determined by a quantum groupoid and its coideal V-subalgebra. This allows us to express the bimodule category of a subfactor in terms of the representation category of a corresponding quantum groupoid and the principal graph as the Bratteli diagram of an inclusion of certain finite-dimensional C*-algebras related to it.


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