arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv math/0309379math.NTmath.AG
收藏

Niveau动机的动机伽罗瓦论$\leq$ 1

Motivic Galois theory for motives of niveau $\leq$ 1

Cristiana Bertolin

摘要:

设T是特征为0的域k上的Tannakian范畴,π(T)是它的基本群.本文证明了T的Tannakian子范畴的otimes-等价类与π(T)的正规仿射群子T-概型之间存在一个双射。我们把这个结果应用于由定义在k上的niveau \leq 1的动机生成的Tannakian范畴T_1(k),其基本群称为niveau \leq 1的动机的动机伽罗瓦群G_mot(T_1(k)).我们找到了G_mot(T_1(k))的仿射群子T_1(k)-格式的四个短正合列,它们通过包含和投影相互关联。此外,我们还给出了一个1-动机M,明确地计算了由M生成的最大Tannakian子范畴,它的基本群是交换的。

英文摘要:

Let T be a Tannakian category over a field k of characteristic 0 and π(T) its fundamental group. In this paper we prove that there is a bijection between the otimes-equivalence classes of Tannakian subcategories of T and the normal affine group sub-T-schemes of π(T). We apply this result to the Tannakian category T_1(k) generated by motives of niveau \leq 1 defined over k, whose fundamental group is called the motivic Galois group G_mot(T_1(k)) of motives of niveau \leq 1. We find four short exact sequences of affine group sub-T_1(k)-schemes of G_mot(T_1(k)), correlated one to each other by inclusions and projections. Moreover, given a 1-motive M, we compute explicitly the biggest Tannakian subcategory of the one generated by M, whose fundamental group is commutative.

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。

↑