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Adelic descent for K-theory

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arxiv 2111.07202 v1 pith:F5IVYY4G submitted 2021-11-13 math.KT math.AG

classification math.KTmath.AG
keywords descentadeliccdotequivalencek-theorylocalizingproveresult
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abstract

We prove an adelic descent result for localizing invariants: for each Noetherian scheme $X$ of finite Krull dimension and any localizing invariant $E$, e.g., algebraic K-theory of Bass-Thomason, there is an equivalence $E(X)\simeq \lim E(A^{\cdot}_{\text{red}}(X))$, where $A^{\cdot}_{\text{red}}(X)$ denotes Beilinson's semi-cosimplicial ring of reduced adeles on $X$. We deduce the equivalence from a closely related cubical descent result, which we prove by establishing certain exact sequences of perfect module categories over adele rings.

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  1. Adelic descent for continuous localizing invariants

    math.AG 2025-07 conditional novelty 6.0 of 10

    Every continuous localizing invariant satisfies adelic descent when computed on nuclear modules over the adelic rings of a scheme of finite type over Z.

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