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arXiv 1612.03367math.NT
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$p$进霍奇理论中的幂零轨道定理

Nilpotent orbit theorem in $p$-adic Hodge theory

Mohammad Reza Rahmati, Gerardo Flores

AI总结:

该研究在$p$进霍奇理论框架下提出并证明了幂零轨道等三个周期域轨道定理,基于GIT半稳定判据与$p$进傅里叶分析给出距离估计,类比复霍奇情形的相关结果,还涉及混合霍奇结构变分的修正方案。

摘要:

我们提出并证明了$p$进霍奇结构周期域上的三个轨道定理,它们与复情形下的轨道定理相类似。我们将研究定义在$p$进域上的一族射影簇$f:\bar{\frak{X}} \to S$的德拉姆(resp. 平展)上同调的变分。首先,我们证明$p$进霍奇结构周期域中的任意幂零轨道都收敛于$p$进霍奇结构周期域中的一个半稳定点(滤过)。此外,极限点的幂零轨道渐近于扭曲周期映射[定理\ref{thm:nilpotent-orbit}]。这些轨道定理附带了幂零轨道与扭曲周期映射之间距离的若干估计。$p$进幂零轨道定理中的距离估计是针对非阿基米德度量给出的,且基于Amice-Schneider的$p$进傅里叶分析。该结果与W. Schmid[\ref{Sch}-1973]关于复霍奇结构的轨道定理相类似。我们的证明基于半稳定性的几何不变量理论(Geometric Invariant Theory,简称GIT)判据(Kempf-Ness定理)以及(Amice-Schneider)$p$进傅里叶理论中的估计。我们还提出了$p$进情形下的$SL_2$-轨道定理[定理\ref{th:homomorphism}]。最后,我们说明了针对混合霍奇结构的变分,应当如何修正并表述幂零轨道定理[定理\ref{thm:mixed-orbit}]。

英文摘要:

We state and prove three orbit theorems on the period domains for the $p$-adic Hodge structure analogous to the complex case. We shall consider the variation of de Rham (resp. étale) cohomology in a family of projective varieties $f:\mathfrak{X} \to S$ defined over a p-adic field. First, we show that any nilpotent orbit in the period domain of p-adic Hodge structures converges to a semistable point (filtration) in the period domain of the p-adic Hodge structure. Furthermore, the nilpotent orbits of the limit point are asymptotic to the twisted period map [Theorem \ref{thm:nilpotent-orbit}]. The orbit theorems come with some estimates of the distance between the nilpotent orbit and the twisted period map. The distance estimate in the p-adic nilpotent orbit theorem is given concerning the non-archimedean metric and is based on the p-adic Fourier analysis of Amice-Schneider. The result is analogous to the orbit theorems of W. Schmid [\cite{Sch}-1973] on complex Hodge structures. Our proof is based on a \textit{Geometric Invariant Theory} (GIT) criterion for semi-stability (Kempf-Ness theorem) and estimates from the (Amice-Schneider) p-adic Fourier theory. We also state the $SL_2$-orbit theorem in the p-adic case, [Theorem \ref{th:homomorphism}]. Finally, we explain how the nilpotent orbit theorem should be modified and stated for a variation of the mixed Hodge structure [Theorem \ref{thm:mixed-orbit}].}

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