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arXiv 2201.06048math.NT
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挠上同调类之间的自守同余

Automorphic congruences between torsion cohomological classes

Boyer Pascal

AI总结:

该研究针对局部可除代数的两个模$l$同余表示,证明其诱导的KHT志村簇上Harris-Taylor局部系统的紧支上同调$l$-挠同构,并推导了特定相似群的精确非tempered自守同余构造。

摘要:

对于某个局部可除代数的两个模$l$同余的表示,它们在KHT志村簇特殊纤维的相应牛顿层上诱导出两个Harris-Taylor局部系统,我们证明它们各自的紧支上同调群的$l$-挠是同构的,等价地,每个上同调群的自由商模$l$同余。随后我们推导了符号为$(1,d-1)$的相似群$G/\u211a$的精确非 tempered 自守同余的构造。

英文摘要:

For two representations of some local division algebra, congruent modulo $l$, giving rise to two Harris-Taylor local systems on the corresponding Newton strata of the special fiber of a KHT Shimura varieties, we prove that the $l$-torsion of each of their cohomology groups with compact supports are isomorphic, or equivalently the free quotients of each of the cohomology groups are congruent modulo $l$. We then deduce the construction of accurate non tempered automorphic congruences for a similitude group $G/\mathbb Q$ with signature $(1,d-1)$.

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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