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arXiv 1301.4595math.AG
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循环曲线的小亏格的θ空量

Thetanulls of cyclic curves of small genus

E. Previato, T. Shaska, G. S. Wijesiri

AI总结:

本文研究了循环曲线的小亏格中θ空量之间的关系,并通过这些关系确定了特定亏格的曲线特性。

摘要:

我们研究循环曲线的经典θ空量之间的关系,即具有自同构σ的曲线X(亏格g(X)>1),其中σ生成自同构群G的正规子群,且g(X/<σ>)=0。θ空量与投影分支点之间的关系是经典工作的对象,尤其是在双曲曲线的情况下,也有近期的研究。我们通过θ空量之间的关系确定了所有亏格为2和3的曲线,在所有具有上述正规子群<σ>和所有可能的签名C的M_g(G,C)的域中。

英文摘要:

We study relations among the classical thetanulls of cyclic curves, namely curves $\mathcal X$ (of genus $g(\mathcal X)>1$) with an automorphism $σ$ such that $σ$ generates a normal subgroup of the group $G$ of automorphisms, and $g (\mathcal X/ < σ>) =0$. Relations between thetanulls and branch points of the projection are the object of much classical work, especially for hyperelliptic curves, and of recent work, in the cyclic case. We determine the curves of genus 2 and 3 in the locus $\mathcal M_g (G, \textbf{C})$ for all $G$ that have a normal subgroup $<\s>$ as above, and all possible signatures \textbf{C}, via relations among their thetanulls.

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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