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arXiv 1002.1618math.AG
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曲线模空间上张氏不变量的二阶变分

Second variation of Zhang's lambda-invariant on the moduli space of curves

Robin de Jong

摘要:

我们计算λ-不变量的二阶变分,最近由S。Zhang,在亏格g>1的曲线的复模空间M_g上,利用N.川澄结果我们证明了(8 g +4)λ在一定常数下等于R在不久前引入的β-不变量。Hain和D.里德我们推导出一些结果;例如,我们计算每个超椭圆曲线的λ-不变量,用判别式模形式的Petersson范数表示。

英文摘要:

We compute the second variation of the λ-invariant, recently introduced by S. Zhang, on the complex moduli space M_g of curves of genus g>1, using work of N. Kawazumi. As a result we prove that (8g+4)λis equal, up to a constant, to the β-invariant introduced some time ago by R. Hain and D. Reed. We deduce some consequences; for example we calculate the λ-invariant for each hyperelliptic curve, expressing it in terms of the Petersson norm of the discriminant modular form.

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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