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arXiv 1708.04885math.NT
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G-值局部变形环与整体提升

G-valued local deformation rings and global lifts

Rebecca Bellovin, Toby Gee

摘要:

本文研究了G-值Galois变形环,其中G是Z_l的扩张上的任意(不一定连通)约化群,其中l是素数.特别是,对于伽罗瓦群的p进局部域(与p可能等于l),我们证明了这些环是一般光滑的,计算其尺寸,并表明函运算伽罗瓦表示产生定义良好的映射之间的集合的不可约组件的相应变形环。我们利用这些局部结果证明了具有规定局部性质的整体变形环的维数的下界。应用我们的结果酉群,我们改进的结果在文献中的存在升降机模l伽罗瓦表示,并在重量部分的塞尔猜想。

英文摘要:

We study G-valued Galois deformation rings with prescribed properties, where G is an arbitrary (not necessarily connected) reductive group over an extension of Z_l for some prime l. In particular, for the Galois groups of p-adic local fields (with p possibly equal to l) we prove that these rings are generically smooth, compute their dimensions, and show that functorial operations on Galois representations give rise to well-defined maps between the sets of irreducible components of the corresponding deformation rings. We use these local results to prove lower bounds on the dimension of global deformation rings with prescribed local properties. Applying our results to unitary groups, we improve results in the literature on the existence of lifts of mod l Galois representations, and on the weight part of Serre's conjecture.

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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