Seminar series
Date
Tue, 19 Nov 2019
Time
17:00 -
18:00
Location
C1
Speaker
Chris Bruce
Organisation
University of Victoria
Congruence monoids in the ring of integers are given by certain unions of arithmetic progressions. To each congruence monoid, there is a canonical way to associate a semigroup C*-algebra. I will explain this construction and then discuss joint work with Xin Li on K-theoretic invariants. I will also indicate how all of this generalizes to congruence monoids in the ring of integers of an arbitrary algebraic number field.