Galois structure of the holomorphic differentials of curves
Galois structure of the holomorphic differentials of curves
复制标题
曲线全纯微分的伽罗瓦结构
DOI:
10.1016/j.jnt.2020.04.015
复制
发表时间:
2020
影响因子:
0.7
通讯作者:
Kontogeorgis, Aristides
中科院分区:
文献类型:
--
作者:
Bleher, Frauke M.;Chinburg, Ted;Kontogeorgis, Aristides
Let X be a smooth projective geometrically irreducible curve over a perfect field k of positive characteristic p. Suppose G is a finite group acting faithfully on X such that G has non-trivial cyclic Sylow p-subgroups. We show that the decomposition of the space of holomorphic differentials of X into a direct sum of indecomposable k [G]-modules is uniquely determined by the lower ramification groups and the fundamental characters of closed points of X that are ramified in the cover X⟶ X/G. We apply our method to determine the PSL (2, F ℓ)-module structure of the space of holomorphic differentials of the reduction of the modular curve X (ℓ) modulo p when p and ℓ are distinct odd primes and the action of PSL (2, F ℓ) on this reduction is not tamely ramified. This provides some non-trivial congruences modulo appropriate maximal ideals containing p between modular forms arising from isotypic components with respect to the action of PSL (2, F ℓ) on X (ℓ).
登录
查看更多内容
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
E. Hecke
通讯作者:
E. Hecke
DOI:
--
发表时间:
1981
期刊:
影响因子:
--
作者:
R. C. Valentini;M. Madan
通讯作者:
M. Madan
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
Peter R. Bending;A. Camina;R. Guralnick
通讯作者:
R. Guralnick
DOI:
--
发表时间:
1986
期刊:
影响因子:
--
作者:
E. Kani
通讯作者:
E. Kani
DOI:
--
发表时间:
1986
期刊:
影响因子:
--
作者:
S. Nakajima
通讯作者:
S. Nakajima