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arXiv 2110.00596math.AG
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正特征的del Pezzo曲面上的有理曲线

Rational curves on del Pezzo surfaces in positive characteristic

Roya Beheshti, Brian Lehmann, Eric Riedl, Sho Tanimoto

摘要:

研究了正特征的del Pezzo曲面上的有理曲线空间.对于大多数素数p,我们证明了给定nef类的有理曲线的模空间的不可约性,推广了Testa在特征0.我们还研究了弱del Pezzo曲面的几何Manin猜想的原理。在这一研究过程中,我们给出了定义在$\mathbb{F}_{2}(t)$或$\mathbb{F}_{3}(t)$上的弱del Pezzo曲面的例子,使得Manin猜想中的例外集是Zebraki稠密的.

英文摘要:

We study the space of rational curves on del Pezzo surfaces in positive characteristic. For most primes p we prove the irreducibility of the moduli space of rational curves of a given nef class, extending results of Testa in characteristic 0. We also investigate the principles of Geometric Manin's Conjecture for weak del Pezzo surfaces. In the course of this investigation, we give examples of weak del Pezzo surfaces defined over $\mathbb{F}_{2}(t)$ or $\mathbb{F}_{3}(t)$ such that the exceptional sets in Manin's Conjecture are Zariski dense.

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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