English

Polar decomposition in algebraic K-theory

Operator Algebras 2023-06-21 v2

Abstract

We show that the Hausdorffized algebraic K-theory of a C*-algebra decomposes naturally as a direct sum of the Hausdorffized unitary algebraic K-theory and the space of continuous affine functions on the trace simplex. Under mild regularity hypotheses, an analogous natural direct sum decomposition holds for the ordinary (non-Hausdorffized) algebraic K-theory.

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Cite

@article{arxiv.2303.16248,
  title  = {Polar decomposition in algebraic K-theory},
  author = {Pawel Sarkowicz and Aaron Tikuisis},
  journal= {arXiv preprint arXiv:2303.16248},
  year   = {2023}
}

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submission version

R2 v1 2026-06-28T09:38:40.752Z