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Past Seminars
Tue
09/26/2017
4:00pm
Seminar: Algebra
Stabilizing Spectral Functors of Exact Categories
Juan Villeta-Garcia, Emory University
Contact: John Duncan, john.duncan@emory.edu
Venue: Mathematics and Science Center, Room W306
Algebraic K-Theory is often thought of as “the” universal additive invariant of rings (or more generally, exact categories). Often, however, functors on exact categories don’t satisfy additivity. We will describe a procedure due to McCarthy that constructs a functor’s universal additive approximation, and apply it to different local coefficient systems, recovering known invariants of rings (K-Theory, THH, etc.). We will talk about what happens when we push these constructions to the world of spectra, and tie in work of Lindenstrauss and McCarthy on the Taylor tower of Algebraic K-Theory.