English

A categorical study on the generalized type semigroup

Operator Algebras 2022-06-24 v2 Dynamical Systems

Abstract

In this short note, we show that the generalized type semigroup \CW(X,Γ)\CW(X, \Gamma) introduced by the author in \cite{M3} belongs to the category \textnormal{W}. In particular, we demonstrate that \CW(X,Γ)\CW(X, \Gamma) satisfies axioms (W1)-(W4) and (W6). When XX is zero-dimensional, we also establish (W5) for the semigroup. This supports the analogy between the generalized type semigroup and pre-completed Cuntz semigroup W()W(\cdot) for CC^*-algebras.

Keywords

Cite

@article{arxiv.2107.10816,
  title  = {A categorical study on the generalized type semigroup},
  author = {Xin Ma},
  journal= {arXiv preprint arXiv:2107.10816},
  year   = {2022}
}

Comments

Major revision. To appear in Proceedings of AMS

R2 v1 2026-06-24T04:26:22.388Z