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arXiv 1106.6310math.GT
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希钦表示的长度函数

Length functions of Hitchin representations

Guillaume Dreyer

摘要:

给定一个希钦表示$ρ\colon π_1(S) \to \PSL_n(\mathbb{R})$,我们构造$n$连续函数$\ell_i^ρ\colon \mathcal \CH(S) \to \mathbb{R}$定义在空间上的Hölder测地电流$\CH(S)$,使一个封闭的,定向曲线$γ$在$S$,$i$ -th特征值矩阵$ρ(γ)\in \PSL_n(\mathbb{R})$的形式是$\pm \mathrm{exp}\, \ell_i^ρ(γ)$:这样的功能推广到更高的秩瑟斯顿的长度函数Fuchsian re \presentations。这些长度$\ell_i^ρ$的身份,不同的\rentiability属性,以及应用本征值估计,也被认为是。

英文摘要:

Given a Hitchin representation $ρ\colon π_1(S) \to \PSL_n(\mathbb{R})$, we construct $n$ continuous functions $\ell_i^ρ\colon \mathcal \CH(S) \to \mathbb{R}$ defined on the space of Hölder geodesic currents $\CH(S)$ such that, for a closed, oriented curve $γ$ in $S$, the $i$--th eigenvalue of the matrix $ρ(γ)\in \PSL_n(\mathbb{R})$ is of the form $\pm \mathrm{exp}\, \ell_i^ρ(γ)$: such functions generalize to higher rank Thurston's length function of Fuchsian re\presentations. Identities, diffe\rentiability properties of these lengths $\ell_i^ρ$, as well as applications to eigenvalue estimates, are also considered.

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