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arXiv 1209.6447math.AG
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q>=2的一般型曲面在上同调中平凡作用的自同构

Automorphisms of surfaces of general type with q>=2 acting trivially in cohomology

Jin-Xing Cai, Wenfei Liu, Lei Zhang

摘要:

紧致复流形X称为有理上同调刚性的,如果它的自同构群Aut(X)忠实地作用在上同调环H*(X,Q)上.本文证明了,当q>2时,一般类型的曲面是有理上同调刚化的,当q=2时,极小曲面S也是有理上同调刚化的,除非K^2=8X.这部分回答了法布里齐奥·卡坦尼斯的一个问题。作为例子,我们给出了一个完整的分类的表面同构的产品与q=2,不合理上同调刚性。然而,这些表面被证明是硬化的。

英文摘要:

A compact complex manifold X is said to be rationally cohomologically rigidified if its automorphism group Aut(X) acts faithfully on the cohomology ring H*(X,Q). In this note, we prove that, surfaces of general type with irregularity q>2 are rationally cohomologically rigidified, and so are minimal surfaces S with q=2 unless K^2=8X. This answers a question of Fabrizio Catanese in part. As examples we give a complete classification of surfaces isogenous to a product with q=2 that are not rationally cohomologically rigidified. These surfaces turn out however to be rigidified.

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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