The Modular Group Action on Real SL(2)-characters of a One-Holed Torus

The Modular Group Action on Real SL(2)-characters of a One-Holed Torus
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DOI:
10.2140/gt.2003.7.443
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发表时间:
2003-05
期刊:
arXiv: Differential Geometry
影响因子:
--
通讯作者:
W. Goldman
W. Goldman
中科院分区:
其他
文献类型:
--
作者:
W. Goldman

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多项式kappa(x,y,z)= x^2 + y^2 + z^2 - xyz-2的自同构群Gamma同构于PGL(2,Z)与(Z/2+Z/2)的半直积。对于R中的t,ktR = kappa^{-1}(t)intersect R上的Gamma作用表现出丰富多样的动力学。Gamma的作用保留了Poisson结构,该结构定义了每个ktR上的Gamma不变面积形式。对于t18,在这种情况下,γ作用于补体ktR -Ω是遍历的。
The group Gamma of automorphisms of the polynomial kappa(x,y,z) = x^2 + y^2 + z^2 - xyz -2 is isomorphic to PGL(2,Z) semi-direct product with (Z/2+Z/2). For t in R, Gamma-action on ktR = kappa^{-1}(t) intersect R displays rich and varied dynamics. The action of Gamma preserves a Poisson structure defining a Gamma-invariant area form on each ktR. For t 18, in which case the Gamma-action on the complement ktR - Omega is ergodic.