Categorical Milnor squares and K-theory of algebraic stacks

Bachmann, Tom and Khan, Adeel A. and Ravi, Charanya and Sosnilo, Vladimir (2022) Categorical Milnor squares and K-theory of algebraic stacks. SELECTA MATHEMATICA-NEW SERIES, 28 (5): 85. ISSN 1022-1824, 1420-9020

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Abstract

We introduce a notion of Milnor square of stable infinity-categories and prove a criterion under which algebraic K-theory sends such a square to a cartesian square of spectra. We apply this to prove Milnor excision and proper excision theorems in the K-theory of algebraic stacks with affine diagonal and nice stabilizers. This yields a generalization of Weibel's conjecture on the vanishing of negative K-groups for this class of stacks.

Item Type: Article
Uncontrolled Keywords: DESCENT; COMPLEXES;
Subjects: 500 Science > 510 Mathematics
Divisions: Mathematics > Prof. Dr. Ulrich Bunke
Depositing User: Dr. Gernot Deinzer
Date Deposited: 08 Feb 2024 16:07
Last Modified: 08 Feb 2024 16:07
URI: https://pred.uni-regensburg.de/id/eprint/57818

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