Non-associative structures in extended geometry
Abstract
We consider a generalisation of vector fields on a vector space, where the vector space is generalised to a highest-weight module over a Kac-Moody algebra. The generalised vector field is an element in a non-associative superalgebra defined by the module and the Kac-Moody algebra. Also the Lie derivative of a vector field parameterised by another is generalised and expressed in a simple way in terms of this superalgebra. It reproduces the generalised Lie derivative in the general framework of extended geometry, which in special cases reduces to the one in exceptional field theory, unifying diffeomorphisms with gauge transformations in supergravity theories.
Cite
@article{arxiv.2509.14215,
title = {Non-associative structures in extended geometry},
author = {Martin Cederwall and Jakob Palmkvist},
journal= {arXiv preprint arXiv:2509.14215},
year = {2026}
}
Comments
v2: 8 pages. Slightly extended and reorganised. Accepted for publication in the AMS Contemporary Mathematics series