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arXiv math/0602518math.AGmath.GR
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具有11阶辛自同构的K3曲面

K3 surfaces with a symplectic automorphism of order 11

Igor Dolgachev, JongHae Keum

摘要:

我们分类可能的有限群的辛自同构的K3曲面的阶可除11。基域的特性必须等于11。这样的群的完整列表由五个群组成:11阶循环群,$11\rtimes 5$,$L_2(11)$和马蒂厄群$M_{11}$,$M_{22}$。我们还表明,表面$X$承认的自同构$g$阶11承认$g$不变的椭圆纤维化的雅可比纤维化同构的显式给定的椭圆K3表面之一。

英文摘要:

We classify possible finite groups of symplectic automorphisms of K3 surfaces of order divisible by 11. The characteristic of the ground field must be equal to 11. The complete list of such groups consists of five groups: the cyclic group of order 11, $11\rtimes 5$, $L_2(11)$ and the Mathieu groups $M_{11}$, $M_{22}$. We also show that a surface $X$ admitting an automorphism $g$ of order 11 admits a $g$-invariant elliptic fibration with the Jacobian fibration isomorphic to one of explicitly given elliptic K3 surfaces.

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