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arXiv math/9906006math.AG
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关于K3曲面上的Vorontsov定理

On Vorontsov's theorem on K3 surfaces

K. Oguiso, D. -Q. Zhang

摘要:

设X是一个K3曲面,它具有Neron-Severi格S_X和超越格T_X. Nukulin考虑了自然表示Aut(X)-> O(S_X)的核H_X,证明了H_{X}是有限的循环群,且φ(h(X))|t(X),忠实地作用于空间H^{2,0}(X)= C omega_{X},其中h(X)= ord(H_X),t(X)= rank T_X,phi(.)欧拉函数。考虑其中phi(h(X))= t(X)的极值情况。在T_{X}是幺模的情况下,近藤确定了t(X)的列表以及实际实现,并证明了t(X)单独唯一地确定了X的同构类(其中phi(h(X))= t(X))。我们解决了T_X不是幺模的剩余情形。一起,我们提供了证明定理宣布沃龙佐夫。

英文摘要:

Let X be a K3 surface with the Neron-Severi lattice S_X and transcendental lattice T_X. Nukulin considered the kernel H_X of the natural representation Aut(X) ---> O(S_X) and proved that H_{X} is a finite cyclic group with phi(h(X))) | t(X) and acts faithfully on the space H^{2,0}(X) = C omega_{X}, where h(X) = ord(H_X), t(X) = rank T_X and phi(.) is the Euler function. Consider the extremal case where phi(h(X)) = t(X). In the situation where T_{X} is unimodular, Kondo has determined the list of t(X), as well as the actual realizations, and showed that t(X) alone uniquely determines the isomorphism class of X (with phi(h(X)) = t(X)). We settle the remaining situation where T_X is not unimodular. Together, we provide the proof for the theorem announced by Vorontsov.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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