Intersection of modular polynomials

Intersection of modular polynomials
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模多项式的交集

DOI:
10.1090/s0002-9939-08-09750-5
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发表时间:
2008
期刊:
影响因子:
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通讯作者:
Jie Ling
Jie Ling
中科院分区:
--
文献类型:
--
作者:
Jie Ling

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在本文中,我们考虑经典模多项式的交集。仿射空间上的交数由著名的Hurwitz类数给出。给出了两种不同的方法来计算A2的两种不同紧化的交数.这产生了一个新的和更基本的公式的交叉数。因此,我们得到一个类数关系。我们还给出了这类数关系的一个纯组合证明。
In this paper, we consider the intersection of classic modular polynomials. The intersection number on affine space is given by the well-known Hurwitz class numbers. We give two different ways to compute the intersection number by two different compactifications of A 2 . This yields a new and more elementary formula for the intersection number. Consequently we get a class number relation. We also give a pure combinatorial proof of this class number relation.