Quadratic & additive mappings on operator commuting elements in JBW*-algebras
Operator Algebras
2026-03-18 v1 Functional Analysis
Abstract
Let and be JBW-algebras whose sets of unitaries are denoted by and , respectively. We show that is closed for Jordan products of operator commuting pairs inside itself. Assuming that and are JBW-algebras without direct summands of type or , we prove that for each bicontinuous bijection satisfying whenever and are operator commuting unitaries in , there exist a linear Jordan -isomorphism , a real linear mapping , and an invertible central element such that for all . The conclusion improves when is a JBW-algebra factor not of type .
Cite
@article{arxiv.2603.16687,
title = {Quadratic & additive mappings on operator commuting elements in JBW*-algebras},
author = {Gerardo M. Escolano and Jan Hamhalter and Antonio M. Peralta and Armando R. Villena},
journal= {arXiv preprint arXiv:2603.16687},
year = {2026}
}