BOLSINOV, A.V. and TSONEV, D., 2014. On one class of holonomy groups in pseudo-Riemannian geometry.arXiv:1107.2361v2 [math.DG]
We describe a new class of holonomy groups on pseudo-Riemannian manifolds. Namely, we prove the following theorem. Let g be a nondegenerate bilinear form on a vector space V, and L:V -> V a g-symmetric operator. Then the identity component of the centraliser of L in SO(g) is a holonomy group for a suitable Levi-Civita connection.
This pre-print was submitted to arXiv on 31st January 2014. The paper was later revised and published as a journal article, the details are: BOLSINOV, A.V. and TSONEV, D., 2014. On a new class of holonomy groups in pseudo-Riemannian geometry. Journal of Differential Geometry, 97 (3), pp.377-394