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arXiv 1904.09522math.NT
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在分圆极限中,普通变形是畅通无阻的

Ordinary deformations are unobstructed in the cyclotomic limit

Ashay Burungale, Laurent Clozel

摘要:

全实数域(在有限域$k$上)的绝对伽罗瓦群的常表示的变形理论已经研究了很长时间,从Hida,Mazur和Tilouine的工作开始,并由Wiles和其他人继续。飞研究了行为的这些变形时,人们认为$p$ -分圆塔的扩展领域。在极限中,我们得到一个变形环$R_\infty$,它分类了$p$ -分圆扩张(的伽罗瓦群)的普通变形。我们证明了如果$R_\infty$是Noether的,并且某些伴随$μ$不变量消失(正如通常所预期的那样),则$R_\infty$在$k$的Witt向量环上是自由的。

英文摘要:

The deformation theory of ordinary representations of the absolute Galois groups of totally real number fields (over a finite field $k$) has been studied for a long time, starting with the work of Hida, Mazur and Tilouine, and continued by Wiles and others. Hida has studied the behaviour of these deformations when one considers the $p$-cyclotomic tower of extensions of the field. In the limit, one obtains a deformation ring $R_\infty$ classifying the ordinary deformations of the (Galois group of) the $p$-cyclotomic extension. We show that if $R_\infty$ is Noetherian and certain adjoint $μ$-invariants vanish (as is often expected), then $R_\infty$ is free over the ring of Witt vectors of $k$.

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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