论文标题
关于割线有缺陷的品种，特别是维度4
On secant defective varieties, in particular of dimension 4
论文作者
论文摘要
在本文中，我们证明了割线有缺陷品种的一些一般结果。然后，我们专注于4维情况，并全面分类为4倍 - 倍。本文受到G. Scorza的古典作品的启发，
In this paper we prove some general results on secant defective varieties. Then we focus on the 4--dimensional case and we give the full classification of secant defective 4--folds. This paper has been inspired by classical work by G. Scorza,
