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arXiv 1106.4895math.NT
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二次型及其θ级数-无穷小方面

Quadratic forms and their theta series - infinitesimal aspects

Juan Marcos Cerviño, Georg Hein

摘要:

研究了实二次型的θ映射.我们引入了两个不变量,反映了theta映射的微分是消失还是退化。我们提供的例子格的差异是零。这些不变量是整格的模形式。我们在秩二的情况下说明这一点。

英文摘要:

We study the theta map which assigns to a real quadratic form its theta series. We introduce two invariants reflecting whether the differential of the theta map vanishes or is degenerate. We provide examples of lattices where this differential is zero. These invariants turn out to be modular forms for integral lattices. We illustrate this in the rank two case.

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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