AHS-structures and affine holonomies

Abstract

We show that a large class of non-metric, non-symplectic affine holonomies can be realized, uniformly and without case by case considerations, by Weyl connections associated to the natural AHS-structures on certain generalized flag manifolds.Comment: AMS-LaTeX, 8 pages, v2: changes in exposition; final version; to appear in Proc. Amer. Math. So