The Classifying Lie Algebroid of a Geometric Structure I: Classes of Coframes
arXiv:1103.5850
Abstract
We present a systematic study of symmetries, invariants and moduli spaces of classes of coframes. We introduce a classifying Lie algebroid to give a complete description of the solution to Cartan's realization problem that applies to both the local and the global versions of this problem.
Minor corrections; final version to appear in the Trans. of the AMS