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arXiv 1105.4472math.AG
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Prym-正则线丛的Prym映射和第二高斯映射

Prym map and second gaussian map for Prym-canonical line bundles

Elisabetta Colombo, Paola Frediani

摘要:

证明了Prym映射的第二基本型提升了Prym-典范丛的第二高斯映射。通过退化为二元曲线,我们证明了当g > 19时,该高斯映射对于R_g的一般点[C,A]是满射的.

英文摘要:

We show that the second fundamental form of the Prym map lifts the second gaussian map of the Prym-canonical bundle. We prove, by degeneration to binary curves, that this gaussian map is surjective for the general point [C,A] of R_g for g > 19.

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