Ergodic decompositions of geometric measures on Anosov homogeneous spaces

Ergodic decompositions of geometric measures on Anosov homogeneous spaces
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Anosov 齐次空间上几何测度的遍历分解

DOI:
10.1007/s11856-023-2560-2
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发表时间:
2020
影响因子:
1
通讯作者:
H. Oh
H. Oh
中科院分区:
数学2区
文献类型:
--
作者:
Minju M. Lee;H. Oh

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设$G$是一个连通的半单真实的代数群,$\Gamma$是$G$的一个Zebraki稠密Anosov子群.设$N$是$G$的极大次球面子群,$P$是$N$的正规化子,且具有固定的Langlands分解$P=MAN$。本文证明了对$\Gamma\反斜杠G$上的任意非平凡的$NM$-不变遍历和$P$-拟不变测度$\mu$,$\mu=\sum_{\cal{E}_0\in \mathfrak Y_\Gamma} \mu|_{\cal{E}_0}$描述了$N$-遍历分解,其中$\mathfrak Y_\Gamma$表示$\Gamma\反斜杠G$的所有$P^\circ$-极小子集的集合。作为结果,我们推导出所有非平凡的$N$-不变遍历和$P^\circ$-拟不变Radon测度的空间,直到正常数倍,同胚于${\mathbb R}^{\text{rank}\,G-1}\times \{1,\cdots,\#\mathfrak Y_\Gamma\}$。
Let $G$ be a connected semisimple real algebraic group and $\Gamma$ a Zariski dense Anosov subgroup of $G$. Let $N$ be a maximal horospherical subgroup of $G$ and $P$ the normalizer of $N$ with a fixed Langlands decomposition $P=MAN$. We prove that for any non-trivial $NM$-invariant ergodic and $P$-quasi invariant measure $\mu$ on $\Gamma\backslash G$, $\mu=\sum_{\cal{E}_0\in \mathfrak Y_\Gamma} \mu|_{\cal{E}_0}$ describes the $N$-ergodic decomposition, where $\mathfrak Y_\Gamma$ denotes the collection of all $P^\circ$-minimal subsets of $\Gamma\backslash G$. As a consequence, we deduce that the space of all non-trivial $N$-invariant ergodic and $P^\circ$-quasi-invariant Radon measures on $\Gamma\backslash G$, up to positive constant multiples, is homeomorphic to ${\mathbb R}^{\text{rank}\,G-1}\times \{1,\cdots, \#\mathfrak Y_\Gamma\}$.
Anosov 群:局部混合、计数和均匀分布
DOI: 10.2140/gt.2023.27.513
发表时间: 2023
影响因子: 2
作者:
Edwards, Samuel;Lee, Minju;Oh, Hee
通讯作者: Oh, Hee
Anosov 群的星球不变测度和等级二分法
DOI: 10.3934/jmd.2023009
发表时间: 2023
影响因子: 1.1
作者:
Landesberg, Or;Lee, Minju;Lindenstrauss, Elon;Oh, Hee
通讯作者: Oh, Hee
DOI: 10.1093/imrn/rnac262
发表时间: 2022
影响因子: 1
作者:
Lee, Minju;Oh, Hee
通讯作者: Oh, Hee