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arXiv 1603.09412math.NT
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一族Eta商和Ramanujan-Mordell定理的推广

A family of Eta Quotients and an Extension of the Ramanujan-Mordell Theorem

Ayse Alaca, Saban Alaca, Zafer Selcuk Aygin

摘要:

令$k\geq 2$为整数,$j$为满足$1\leq j \leq 4k-5$的整数。本文定义了一个η元族$\{ C_{j,k}(z) \}_{1\leq j \leq 4k-5} $,并证明了这个族构成权$2k$和水平$12$的尖点形式空间$S_{2k} (Γ_0 (12))$的基.然后,我们使用这个基础上的某些性质的模形式在其尖点,以证明一个扩展的Ramanujan-Mordell公式。

英文摘要:

Let $k\geq 2$ be an integer and $j$ an integer satisfying $1\leq j \leq 4k-5$. We define a family $\{ C_{j,k}(z) \}_{1\leq j \leq 4k-5} $ of eta quotients, and prove that this family constitute a basis for the space $S_{2k} (Γ_0 (12))$ of cusp forms of weight $2k$ and level $12$. We then use this basis together with certain properties of modular forms at their cusps to prove an extension of the Ramanujan-Mordell formula.

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