Galois descent and twists of an abelian variety
Galois descent and twists of an abelian variety
复制标题
伽罗瓦血统和阿贝尔簇的扭曲
DOI:
10.4064/aa-73-1-51-57
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发表时间:
1995
期刊:
影响因子:
0.7
通讯作者:
Masanari Kida
中科院分区:
文献类型:
--
作者:
Masanari Kida
Introduction. It is very interesting to describe the behavior of the Mordell–Weil group of an abelian variety in a field extension and many mathematicians study this problem (for instance, see Honda [2] and Ono [7]). Recently, A. Sato [9] obtained a general result for abelian varieties with certain complex multiplication (the corollaries in Section 2). In this paper, we shall prove a theorem (Theorem in Section 2), from which Sato’s results follow. Roughly speaking, our theorem describes the relation between the Galois descent and twists (see Section 1 for their definitions) and can be considered as a geometric counterpart of Sato’s. We will use the following notation throughout this paper. For a number field k, the separable closure is denoted by ks and we assume that all algebraic extensions of k lie in ks. Let A be an abelian variety defined over k. We set, for any finite extension K of k,
影响因子:
3.1
作者:
J. Milne
通讯作者:
J. Milne