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arXiv 0905.2887math.NT
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基于上同调Hecke作用的尖点形式的显式计算及其复杂性

Explicit Computation of Cusp forms via Hecke Action on Cohomology and its Complexity

Jonas B. Rasmussen

摘要:

在文献中,寻找模形式空间的基的标准方法是通过模符号和模曲线的同调。利用Eichler-Shimura同构,Wang的一项工作展示了如何利用上同调的观点来确定权为$k \geq 2$和特征为$χ$的$Γ_0(N)$上的尖点形式空间的基。有趣的是,看看这种替代方法的复杂性,我们这样做是为了明确实现Wang建议的算法。

英文摘要:

In the literature, the standard approach to finding bases of spaces of modular forms is via modular symbols and the homology of modular curves. By using the Eichler-Shimura isomorphism, a work by Wang shows how one can use a cohomological viewpoint to determine bases of spaces of cusp forms on $Γ_0(N)$ of weight $k \geq 2$ and character $χ$. It is interesting to look at the complexity of this alternative approach, and we do this for an explicit implementation of the algorithm suggested by Wang.

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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