Maximal tame extensions over Hopf orders in rings of integers of p-adic number fields
Maximal tame extensions over Hopf orders in rings of integers of p-adic number fields
复制标题
p进数域整数环中Hopf阶的最大驯服扩展
DOI:
10.1016/j.jalgebra.2003.10.013
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发表时间:
2004
影响因子:
0.9
通讯作者:
Y. Miyata
中科院分区:
文献类型:
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作者:
Y. Miyata
Let K/k be a cyclic totally ramified Kummer extension of degree pnwith Galois group G. Let O and o be the rings of integers in K and k, respectively. For n=1, F. Bertrandias and M.-J. Ferton determined the ring Endo G( O ) of o G -endomorphisms of O and L.N. Childs constructed the maximal order S in O whose ring of o G -endomorphisms is a Hopf order. A Hopf order whose linear dual is a Larson order in kG is called a dual Larson order. In this paper, the generators of a dual Larson order are given. We determine Endo G( O ) and obtain a maximal dual Larson order contained in Endo G( O ) . We construct a Hopf Galois extension S in O , whose ring H(S) of o G -endomorphisms is a dual Larson order. We affirm an order S′ in O with a dual Larson order H(S′) is a tame H(S′)-extension and show that S is maximal in such orders S′.
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