On isogeny characters of Drinfeld modules of rank two
On isogeny characters of Drinfeld modules of rank two
复制标题
论二阶Drinfeld模的同源性
DOI:
10.1007/s00209-021-02921-5
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发表时间:
2022
影响因子:
0.8
通讯作者:
Ishii Shun
中科院分区:
文献类型:
--
作者:
Kazutaka Sagawa;Takaki Akiba;Youhi Morii;Hisashi Nakamura;Kaoru Maruta;角田陽,秋葉貴輝,中村寿,手塚卓也,丸田薫;佐川和孝,秋葉貴輝,森井雄飛,中村寿,丸田薫;Ishii Shun
In this paper, we study cyclic torsion subgroups of Drinfeld-modules of rank two overvia isogeny characters associated to them. Among other things, we prove that such Drinfeld-modules do not have a cyclic-torsion subgroup defined overunder various assumptions, whereis a maximal ideal of. For example, we show that any Drinfeld-module of rank two overwhich has good reduction at every finite place ofdoes not have a-isogeny defined over, whereis a maximal ideal ofwith. We also show that the set ofK-rational points of Drinfeld modular curveonly consists of cusps whenis equal to four. These results partially generalize preceding works by Pál and Armana, respectively.
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DOI:
10.1515/crelle.2010.017
发表时间:
2007
期刊:
--
影响因子:
--
作者:
Ambrus Pál
通讯作者:
Ambrus Pál
DOI:
--
发表时间:
2008
期刊:
Canadian Journal of Mathematics - Journal Canadien de Mathematiques
影响因子:
--
作者:
P. L. Clark;X. Xarles
通讯作者:
X. Xarles
DOI:
10.1007/s00605-004-0261-4
发表时间:
2004
期刊:
Monatshefte für Mathematik
影响因子:
--
作者:
G. V. D. Heiden
通讯作者:
G. V. D. Heiden
影响因子:
0.8
作者:
A. Schweizer
通讯作者:
A. Schweizer
影响因子:
0.9
作者:
Ambrus Pál
通讯作者:
Ambrus Pál