THE LADDER

Speaker(s)

JOHN QUIGG

Affiliation

Arizona State University, Tempe, USA

Language of the talk

English

Date

Oct. 30, 2024, 5:15 p.m.

Link

https://uw-edu-pl.zoom.us/j/95105055663?pwd=TTIvVkxmMndhaHpqMFUrdm8xbzlHdz09

Title in Polish

THE LADDER

Seminar

North Atlantic Noncommutative Geometry Seminar

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We present a new method of establishing a bijective correspondence - in fact, a lattice isomorphism - between invariant ideals of C*-algebras and their crossed products by a fixed locally compact group. It was already known that such a correspondence exists whenever the group is amenable, but our results hold for any locally compact group under a natural form of coaction invariance. Time permitting, we also introduce a similar result for ideals of Fell bundles over groupoids. Joint work with Matthew Gillespie, S. Kaliszewski, and Dana P. Williams.

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