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arXiv 0905.2330math.AG
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关于K3曲面上曲线的第二类高斯映射

On the second gaussian map for curves on a K3 surface

Elisabetta Colombo, Paola Frediani

摘要:

根据Wahl的一个定理,对于K3曲面的超平面截面的正则嵌入曲线,第一高斯映射不是满射的。本文证明了:若C是一般极化K ~ 3曲面的高亏格(大于280)的一般超平面截面,则C的第二高斯映射是满射的.得到了一般曲线的满射二阶高斯映射亏格g的界,g >152。

英文摘要:

By a theorem of Wahl, for canonically embedded curves which are hyperplane sections of K3 surfaces, the first gaussian map is not surjective. In this paper we prove that if C is a general hyperplane section of high genus (greater than 280) of a general polarized K3 surface, then the second gaussian map of C is surjective. The resulting bound for the genus g of a general curve with surjective second gaussian map is decreased to g >152.

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