Circle and sphere bundles in noncommutative geometry
Francesca Arici (Leiden University)
Thursday 14th November, 2019 16:00-17:00 Maths 311B
Abstract
In this talk I will recall how Pimsner algebras of self Morita equivalences can be thought of as total spaces of quantum circle bundles, and the associated six term exact sequence in K-theory can be interpreted as an operator algebraic version of the classical Gysin sequence for circle bundles.
After reviewing some results in this direction, I will report on work in progress concerning the construction of higher dimensional quantum sphere bundles in terms of Cuntz–Pimsner algebras of sub-product systems.
Based on (past and ongoing) joint work with G. Landi and J. Kaad.
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