Institut de Mathématiques, Case 247, Université Paris-6, 4, Place Jussieu, 75252, Paris Cedex 05, France
Abstract:
We show that polarisations of type on -dimensional abelian varieties are never very ample, if . This disproves a conjecture of Debarre, Hulek and Spandaw. We also give a criterion for non-embeddings of abelian varieties into -dimensional linear systems.