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arXiv 1708.00519math.AGmath.GT
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微分层重言环

Tautological ring of strata of differentials

Dawei Chen

摘要:

平滑曲线上的$k$ -微分层表示具有规定的零点和极点阶数的典范丛的$k$次幂的参数截面.使用尖平滑曲线的模空间的$κ$和$ψ$类以及Hodge丛的重言类$η$定义射影化地层的重言环。证明了若不存在$k$阶极点,则重言环仅由$η$生成,否则由对应于$k$阶极点的$ψ$类生成.

英文摘要:

Strata of $k$-differentials on smooth curves parameterize sections of the $k$-th power of the canonical bundle with prescribed orders of zeros and poles. Define the tautological ring of the projectivized strata using the $κ$ and $ψ$ classes of moduli spaces of pointed smooth curves along with the tautological class $η$ of the Hodge bundle. We show that if there is no pole of order $k$, then the tautological ring is generated by $η$ only, and otherwise it is generated by the $ψ$ classes corresponding to the poles of order $k$.

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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