Coisotropy-one homogeneous spacetimes I: (3,2)-Kinematical Lie algebras with d≥ 3
Abstract
This is the first of several papers devoted to the classification of coisotropy-one homogeneous spacetimes. It is the first step in extending the classification of spatially isotropic homogeneous spacetimes of kinematical Lie groups to the much vaster context of homogeneous spacetimes that are not spatially isotropic; that is, where the rotations no longer act transitively on the space of directions in each tangent space. In this first paper we classify (up to isomorphisms preserving the rotational subalgebra) a class of the relevant transitive Lie algebras, the so-called (3,2)-kinematical Lie algebras, for the coisotropy-one case in spatial dimension at least 4. As a by-product of this classification, we classify two-dimensional real representations of Bianchi Lie algebras up to a suitable notion of equivalence.
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BibTeX
@misc{figueroaofarrill2026coisotropyone,
title = {{Coisotropy-one homogeneous spacetimes I: (3,2)-Kinematical Lie algebras with $d\geq 3$}},
author = {José Miguel Figueroa-O'Farrill and Juan Manuel Lorenzo-Naveiro},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.00399},
eprint = {2611.00399},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.00399},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Coisotropy-one homogeneous spacetimes I: (3,2)-Kinematical Lie algebras with d≥ 3
AU - José Miguel Figueroa-O'Farrill
AU - Juan Manuel Lorenzo-Naveiro
PY - 2026
DA - 2026/11/01
PB - arXiv
DO - 10.48550/arxiv.2611.00399
UR - https://arxiv.org/abs/2611.00399
AB - This is the first of several papers devoted to the classification of coisotropy-one homogeneous spacetimes. It is the first step in extending the classification of spatially isotropic homogeneous spacetimes of kinematical Lie groups to the much vaster context of homogeneous spacetimes that are not spatially isotropic; that is, where the rotations no longer act transitively on the space of directions in each tangent space. In this first paper we classify (up to isomorphisms preserving the rotational subalgebra) a class of the relevant transitive Lie algebras, the so-called (3,2)-kinematical Lie algebras, for the coisotropy-one case in spatial dimension at least 4. As a by-product of this classification, we classify two-dimensional real representations of Bianchi Lie algebras up to a suitable notion of equivalence.
ER -