Witt vectors and K-theory of automorphisms via noncommutative motives

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We prove that the functor ring-of-rational-Witt-vectors W_(−) becomes corepresentable in the category of noncommutative motives. As an application, we obtain an immediate extension of W_0(−) from commutative rings to schemes. Then, making use of the theory of noncommutative motives, we classify all natural transformations of the functor K-theory-of-automorphisms.
Original languageUnknown
Pages (from-to)473-482
JournalManuscripta Mathematica
Issue number3-4
Publication statusPublished - 1 Jan 2014

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