On the Galois structure of the class group of certain Kummer extensions
On the Galois structure of the class group of certain Kummer extensions
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某些Kummer扩展的类群的伽罗瓦结构
DOI:
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发表时间:
2018
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通讯作者:
E. Lecouturier
中科院分区:
文献类型:
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作者:
E. Lecouturier
Let p⩾5 and N be prime numbers such that p divides N−1 . We estimate the p ‐rank of the class group of Q(N1/p) in terms of the discrete logarithm, with values in Z/pZ , of certain units. Using the Gross–Koblitz formula and identities on the N ‐adic Gamma function, we explicitly compute these logarithms. In particular, we give a new proof which does not use modular forms of a result of Calegari and Emerton.