Ramification of a finite flat group scheme over a local field
Ramification of a finite flat group scheme over a local field
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有限平坦群方案在局部域上的衍生
DOI:
10.1016/j.jnt.2005.08.006
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发表时间:
2006
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
In this paper, we analyze ramification in the sense of Abbes–Saito of a finite flat group scheme over the ring of integers of a complete discrete valuation field of mixed characteristic (0,p). We deduce that its Galois representation depends only on its reduction modulo explicitly computed p-power. We also give a new proof of a theorem of Fontaine on ramification of a finite flat Galois representation, and extend it to the case where the residue field may be imperfect.