English

Abstract Bivariant Cuntz Semigroups II

Operator Algebras 2024-12-05 v2

Abstract

We previously showed that abstract Cuntz semigroups form a closed symmetric monoidal category. This automatically provides additional structure in the category, such as a composition and an external tensor product, for which we give concrete constructions in order to be used in applications. We further analyse the structure of not necessarily commutative Cu-semi-rings and we obtain, under mild conditions, a new characterization of solid Cu-semirings RR by the condition that R[ ⁣[R,R] ⁣]R\cong [\![ R,R ]\!].

Keywords

Cite

@article{arxiv.1811.08689,
  title  = {Abstract Bivariant Cuntz Semigroups II},
  author = {Ramon Antoine and Francesc Perera and Hannes Thiel},
  journal= {arXiv preprint arXiv:1811.08689},
  year   = {2024}
}

Comments

Minor changes, 21 pages, Forum Math. (accepted version)

R2 v1 2026-06-23T05:23:18.553Z