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arXiv 1208.0128math.AGmath.NT
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有限域上函数域的伽罗瓦表示的有限性定理(Deligne之后)

A finiteness theorem for Galois representations of function fields over finite fields (after Deligne)

Hélène Esnault, Moritz Kerz

摘要:

修改:只是一些错别字,重新组织了一下文章。它将在河内的VIASM年会上发表。我们给Deligne的信Drinfeld日期为2011年6月18日,其中他表明,有许多不可约的利斯$\bar \Q_\ell$ -层有界分支,同构和扭曲,在一个光滑簇定义在一个有限域。证明依赖于Lafforgue的朗兰兹对应曲线。另外,Deligne证明了$\mathbb{Q}$上有限型仿射模的存在性.一个推论德利涅的有限性定理是存在的一些领域,其中包含所有的痕迹Frobenii在封闭点,这是主要的结果,他最近的文章,并回答积极自己的猜想从韦伊二。

英文摘要:

Revised: just some typos, reorganized a bit the article. It will be published in the VIASM Annual meeting, Hanoi. We give a detailed account of Deligne's letter to Drinfeld dated June 18, 2011, in which he shows that there are finitely many irreducible lisse $\bar \Q_\ell$-sheaves with bounded ramification, up to isomorphism and up to twist, on a smooth variety defined over a finite field. The proof relies on Lafforgue's Langlands correspondence over curves. In addition, Deligne shows the existence of affine moduli of finite type over $\mathbb{Q}$. A corollary of Deligne's finiteness theorem is the existence of a number field which contains all traces of the Frobenii at closed points, which was the main result of his recent article and which answers positively his own conjecture from Weil II.

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