On Subvarieties of Abelian Varieties with degenerate Gauss mapping
arXiv:1110.0095
Abstract
We show that for an irreducible subvariety Y of an abelian variety X the Gauss mapping, from the conormal bundle of to the dual of the tangent space of at the origin, is not dominant if and only if Y is degenerate in the sense that there exists a nontrivial abelian subvariety A of X such that A+Y=Y holds
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