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arXiv 2008.08128math.AG
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Halphen 线束的显式构造

Explicit Constructions of Halphen Pencils

University of Pennsylvania(宾夕法尼亚大学)

Aline Zanardini

AI总结:

该研究通过在射影平面中显式构造Halphen线束,得到指数为2的有理椭圆曲面,给出各类奇异纤维的实例(部分类型给出全部实例),建立了曲面纤维与平面曲线的对应并研究了线束中曲线的奇点。

摘要:

我们通过在射影平面 $\boldsymbol{\rm P}^2$ 中显式构造其对应的 Halphen 线束,来构造指数为2的有理椭圆曲面。对于出现的每一类奇异纤维,我们至少构造一个具有该类纤维的例子;事实上,对部分纤维类型我们构造了所有可能的例子。我们建立了有理椭圆曲面中的纤维与对应平面曲线之间的精确对应关系,并特别研究了 Halphen 线束中曲线的奇点。

英文摘要:

We construct rational elliptic surfaces of index two by explicitly constructing their associated Halphen pencils in the projective plane $\mathbb{P}^2$. For each of the types of singular fibers that occur we construct at least one example having that type of fiber and in fact, for some, we construct all possible examples. We establish a precise dictionary between the fibers in a rational elliptic surface and the corresponding plane curves and, in particular, we study the singularities of the curves appearing in a Halphen pencil.

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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