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arXiv math/0605012math.NT
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正交群的子群的Ford型基本区

A fundamental domain of Ford type for some subgroups of the orthogonal group

Eliot Brenner

摘要:

本文研究了局部对称空间$X=Γ\backslash G/K$的谱理论,其中$G=SO(3,Complex)$,$Γ=SO(3,Z[i])$,$K=SO{3}$ .我们写下明确的方程定义一个基本区的$Γ$对$G/K$的作用。该基本区非常适合于研究$G/K$上的$Γ$ -不变函数理论。我们写下方程定义一个基本区的子群$Γ_Z=\SO(2,1)_Z$的$Γ$作用在对称空间$G_R/K_R$,其中$G_R$是分裂实形式$\SO(2,1)$的$G$和$K_R$是它的最大紧凑子群$\SO(2)$。我们制定了一个简单的几何关系的基本域的$Γ$和$Γ_Z$所描述的。然后,我们使用以前的结果计算的共同体积的格$Γ$和$Γ_Z$在$G$和$G_R$。

英文摘要:

We initiate a study of the spectral theory of the locally symmetric space $X=Γ\backslash G/K$, where $G=SO(3,Complex)$, $Γ=SO(3,Z[i])$, $K=SO{3}$. We write down explicit equations defining a fundamental domain for the action of $Γ$ on $G/K$. The fundamental domain is well-adapted for studying the theory of $Γ$-invariant functions on $G/K$. We write down equations defining a fundamental domain for the subgroup $Γ_Z=\SO(2,1)_Z$ of $Γ$ acting on the symmetric space $G_R/K_R$, where $G_R$ is the split real form $\SO(2,1)$ of $G$ and $K_R$ is its maximal compact subgroup $\SO(2)$. We formulate a simple geometric relation between the fundamental domains of $Γ$ and $Γ_Z$ so described. We then use the previous results compute the covolumes of of the lattices $Γ$ and $Γ_Z$ in $G$ and $G_R$.

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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