An order-theoretic characterization of JB-algebras
Functional Analysis
2026-03-24 v3
Abstract
We give an order-theoretic characterization of the JB-algebras among the complete order unit spaces in terms of the existence of an order-anti-automorphism of the interior of the cone that is homogeneous of degree -1. More geometrically, we characterize JB-algebras as those complete order unit spaces for which the interior of the cone is a symmetric Banach--Finsler manifold under Thompson's metric. Furthermore, we show that two order unit spaces are isomorphic if there exists a gauge-reversing bijection between them, thus answering a question raised by Noll--Sch\"afer. These results have previously been established for finite-dimensional resp. reflexive order unit spaces by Walsh and Lemmens--R.--Wortel.
Keywords
Cite
@article{arxiv.2507.09526,
title = {An order-theoretic characterization of JB-algebras},
author = {Mark Roelands and Samuel Tiersma},
journal= {arXiv preprint arXiv:2507.09526},
year = {2026}
}