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Excision in algebraic K-theory revisited

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Tamme, Georg
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Date of publication of this fulltext: 22 Nov 2019 09:52


By a theorem of Suslin, a Tor-unital (not necessarily unital) ring satisfies excision in algebraic K-theory. We give a new and direct proof of Suslin's result based on an exact sequence of categories of perfect modules. In fact, we prove a more general descent result for a pullback square of ring spectra and any localizing invariant. Our descent theorem contains not only Suslin's result, but also ...


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