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arXiv 2603.03041math.AG
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关于具有du Val奇点的del Pezzo表面的核心正则性

On the coregularity of del Pezzo surfaces with du Val singularities

Steklov Mathematical Institute of Russian Academy of Sciences(俄罗斯科学院斯捷克洛夫数学研究所);Moscow Institute of Physics and Technology(莫斯科物理技术学院)

Konstantin Loginov, Andrey Trepalin

AI总结:

研究了具有du Val奇点的del Pezzo表面的核心正则性,发现正核心正则性表面对应于具有特殊性质的非平凡椭圆纤维化,且大多数表面核心正则性为0。

摘要:

我们计算了具有du Val奇点的del Pezzo表面的核心正则性。为此,我们研究了度数为1的del Pezzo表面与椭圆纤维化的关系。结果表明,具有正核心正则性的del Pezzo表面对应于具有某些特殊性质的非平凡椭圆纤维化。我们还证明了关于非代数闭域上del Pezzo表面核心正则性的结果。我们的结果证实了

英文摘要:

We compute the coregularity of del Pezzo surfaces with du Val singularities. To this aim, we study the relation between del Pezzo surfaces of degree $1$ and elliptic fibrations. It turns out that del Pezzo surfaces with positive coregularity correspond to isotrivial elliptic fibrations with some special properties. We also prove results about coregularity of del Pezzo surfaces over non-algebraically closed fields of characteristic $0$. Our results confirm the expectation that "most" del Pezzo surfaces have coregularity $0$, while del Pezzo surfaces with positive coregularity enjoy some special properties.

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