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arXiv 1612.04549math.NTmath.AG
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关于局部域上的形式群和Tate上同调

On formal groups and Tate cohomology in local fields

Nils Ellerbrock, Andreas Nickel

摘要:

设$L/K$是特征$0$的局部域的Galois扩张,其Galois群为$G$ .如果$\mathcal{F}$是$K$中整数环上的形式群,则可以将$\mathcal F$和每个正整数$n$关联到$G$ -模$F_L^n$,其作为集合是$L$中整数环的极大理想的$n$次幂。给出了$F_L^n$是上同调平凡$G$ -模的充分必要条件.这对局部域上的椭圆曲线和数域的射线类群都有应用。

英文摘要:

Let $L/K$ be a Galois extension of local fields of characteristic $0$ with Galois group $G$. If $\mathcal{F}$ is a formal group over the ring of integers in $K$, one can associate to $\mathcal F$ and each positive integer $n$ a $G$-module $F_L^n$ which as a set is the $n$-th power of the maximal ideal of the ring of integers in $L$. We give explicit necessary and sufficient conditions under which $F_L^n$ is a cohomologically trivial $G$-module. This has applications to elliptic curves over local fields and to ray class groups of number fields.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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