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Dévissage for Waldhausen $K\mkern-2mu$-theory

George Raptis

Vol. 7 (2022), No. 3, 467–506
Abstract

A dévissage-type theorem in algebraic K-theory is a statement that identifies the K-theory of a Waldhausen category 𝒞 in terms of the K-theories of a collection of Waldhausen subcategories of 𝒞 when a dévissage condition about the existence of appropriate finite filtrations is satisfied. We distinguish between dévissage theorems of single type and of multiple type depending on the number of Waldhausen subcategories and their properties. The main representative examples of such theorems are Quillen’s original dévissage theorem for abelian categories (single type) and Waldhausen’s theorem on spherical objects for more general Waldhausen categories (multiple type). In this paper, we study some general aspects of dévissage-type theorems and prove a general dévissage theorem of single type and a general dévissage theorem of multiple type.

Keywords
dévissage, $K\mkern-2mu$-theory, Waldhausen category
Mathematical Subject Classification
Primary: 18F25, 19D10
Milestones
Received: 11 June 2021
Revised: 26 June 2022
Accepted: 12 July 2022
Published: 19 December 2022
Authors
George Raptis
Fakultät für Mathematik
Universität Regensburg
Regensburg
Germany