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تسجيل مستخدم جديدCategorical Milnor squares and K-theory of algebraic stacks
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We introduce a notion of Milnor square of stable $infty$-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 Weibels conjecture on the vanishing of negative K-groups for this class of stacks.
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