Geometric structures as deformed infinitesimal symmetries
摘要
A general model for geometric structures on differentiable manifolds is obtained by deforming infinitesimal symmetries. Specifically, this model consists of a Lie algebroid, equipped with an affine connection compatible with the Lie algebroid structure. The curvature of this connection vanishes precisely when the structure is locally symmetric. This model generalizes Cartan geometries, a substantial class, to the intransitive case. Simple examples are surveyed and corresponding local obstructions to symmetry are identified. These examples include foliations, Riemannian structures, infinitesimal G-structures, symplectic and Poisson structures.
引用
@article{arxiv.math/0404313,
title = {Geometric structures as deformed infinitesimal symmetries},
author = {Anthony D. Blaom},
journal= {arXiv preprint arXiv:math/0404313},
year = {2012}
}
备注
Minor revision of first posting. Main changes: - "geometric structure" renamed "Cartan algebroid" - "geometric connection" renamed "Cartan connection" - Reader now directed to sequel paper "Lie algebroids and Cartan's method of equivalence" for the more substantial applications