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arXiv 2407.06007math.AGmath.NT
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不可约全纯辛流形的代数平凡自同构

Algebraically trivial automorphisms of irreducible holomorphic symplectic manifolds

Universität des Saarlandes(萨尔兰大学);Leibniz Universität Hannover(汉诺威莱布尼茨大学)

Stevell Muller

AI总结:

本文扩展 Brandhorst–Cattaneo 的格论方法,对已知 IHS 流形上的代数平凡作用及偶数阶非辛自同构进行分类,并证明非平凡判别式作用情形仅有有限多种可能。

摘要:

我们扩展了 Brandhorst–Cattaneo 的格论方法,以在相差形变和双有理共轭的意义下,对已知 IHS 流形上的代数平凡作用进行分类。特别地,我们分类了偶数阶的代数平凡非辛自同构,无论其是否具有平凡判别式作用。在非平凡判别式作用的情形下,我们证明此类自同构仅对有限多种已知形变类型和阶数存在。

英文摘要:

Given an irreducible holomorphic symplectic (IHS) manifold $X$, we call an automorphism $f$ of $X$ algebraically trivial if $f$ acts trivially on the Néron--Severi group of $X$. In this paper, we extend the approach of Brandhorst--Cattaneo to classify, by means of lattice data, all the pairs $(X, G)$, where $X$ is an IHS manifold of a known deformation type (to this date), and $G$ is a finite group consisting of algebraically trivial automorphisms of $X$ that are nonsymplectic. In particular, we classify even-order algebraically trivial nonsymplectic automorphisms, with or without trivial discriminant action. In the case of nontrivial discriminant actions, we show that such automorphisms only exist for finitely many deformation types and orders

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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