On the compactification of the Drinfeld modular curve of level $\Gamma_1^\Delta(\mathfrak{n})$
On the compactification of the Drinfeld modular curve of level $\Gamma_1^\Delta(\mathfrak{n})$
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关于 $Gamma_1^Delta(mathfrak{n})$ 级 Drinfeld 模曲线的紧化
DOI:
10.1016/j.jnt.2020.07.015
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发表时间:
2020
影响因子:
0.7
通讯作者:
Shin Hattori
中科院分区:
文献类型:
--
作者:
Shin Hattori;Hirokazu Nasu;Shin Hattori
Let p be a rational prime and qa power of p. Let n be a non-constant monic polynomial in Fq [t] which has a prime factor of degree prime to q-1. In this paper, we define a Drinfeld modular curve Y 1Δ (n) over A [1/n] and study the structure around cusps of its compactification X1Δ (n), in a parallel way to Katz-Mazur's work on classical modular curves. Using them, we also de ne a Hodge bundle over X1Δ (n) such that Drinfeld modular forms of level Γ1 (n), weight k and some type are identi ed with global sections of its k-th tensor power