Note on the holonomy groups of pseudo-Riemannian manifolds
arXiv:math/0406397 · doi:10.1134/S0001434613050209
Abstract
For an arbitrary subalgebra , a polynomial pseudo-Riemannian metric of signature is constructed, the holonomy algebra of this metric contains as a subalgebra. This result shows the essential distinction of the holonomy algebras of pseudo-Riemannian manifolds of index bigger or equal to 2 from the holonomy algebras of Riemannian and Lorentzian manifolds.
6 pages, final version