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arXiv 2410.04400math.AG
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光滑带点曲线的模空间上的非上同调环

Non-tautological cycles on moduli spaces of smooth pointed curves

Dario Faro, Carolina Tamborini

AI总结:

本研究推广了已有方法,证明除有限多组亏格$g$和点数$n$外,光滑带点曲线模空间$\bM_{g,n}$上均存在非上同调代数上同调类,覆盖了绝大多数此前未解决的情形。

摘要:

在Arena、Canning、Clader、Haburcak、Li、Mok和Tamborini的近期工作中,已证明对于无穷多组$g$和$n$的取值,亏格为$g$、带$n$个点的光滑曲线的模空间$\u200b\bM_{g,n}$上存在非上同调代数上同调类。本文展示了如何通过推广他们的技术覆盖绝大多数剩余情形,证明除了有限多组$g$和$n$的取值外,模空间$\bM_{g,n}$上均存在非上同调代数上同调类。

英文摘要:

In recent work by Arena, Canning, Clader, Haburcak, Li, Mok, and Tamborini it was proven that for infinitely many values of $g$ and $n$, there exist non-tautological algebraic cohomology classes on the moduli space $\mathcal{M}_{g,n}$ of smooth genus $g$, $n$-pointed curves. Here we show how a generalization of their technique allows to cover most of the remaining cases, proving the existence of non-tautological algebraic cohomology classes on the moduli space $\mathcal{M}_{g,n}$ for all but finitely many values of $g$ and $n$.

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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