arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0902.3761math.AG
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具有特殊对称性的K3-surfaces

K3-surfaces with special symmetry

Kristina Frantzen

摘要:

本文研究了具有有限群作用的K3-曲面的分类问题。重点讨论了具有反辛对合和辛变换的相容作用的K3-曲面。给定一个有限群$G$,研究了它是否能以相容的方式作用在具有反辛对合的K3-曲面$X$上,以及在何种程度上$G$的作用决定了$X$的几何.如果$G$具有大的顺序或丰富的结构的精确描述$X$作为一个分支的双覆盖的Del Pezzo表面。特别是,这导致分类结果的完整列表的11个最大有限群的辛自同构的K3-曲面。论文的其余部分涉及推广到非极大群和具有高阶非辛自同构的K3-曲面。分类依赖于曲面的等变极小模型程序,Del Pezzo曲面上的有限群作用的研究,以及自然关联的例外和不动点曲线的组合相交几何。

英文摘要:

In this dissertation classification problems for K3-surfaces with finite group actions are considered. Special emphasis is put on K3-surfaces with antisymplectic involutions and compatible actions of symplectic transformations. Given a finite group $G$ it is investigated if it can act in a compatible fashion on a K3-surfaces $X$ with antisymplectic involution and to what extend the action of $G$ determines the geometry of $X$. If $G$ has large order or rich structure a precise description of $X$ as a branched double cover of a Del Pezzo surface is obtained. In particular, this leads to classification results for the complete list of eleven maximal finite groups of symplectic automorphisms of K3-surfaces. The remaining part of the thesis deals with generalizations to non-maximal groups and K3-surfaces with non-symplectic automorphisms of higher order. The classification relies on an equivariant minimal model program for surfaces, the study of finite group actions on Del Pezzo surfaces, and the combinatorial intersection geometry of naturally associated exceptional and fixed point curves.

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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