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arXiv 1707.04764math.DS
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模匹配的动力学

Dynamics of Modular Matings

Shaun Bullett, Luna Lomonaco

摘要:

我们发展动力学理论的家庭全纯对应$\mathcal{F}_a$证明了目前的作者之间的模群和抛物有理映射的Milnor切片$Per_1(1)$(在'交配二次映射与模群II')的交配。这样的配对赋予了$\mathcal{F}_a$的极限集的补集以双曲平面的几何形状,配备了模群的作用。我们引入双无限编码序列测地线在这个补充,利用连分数表达式的端点,我们证明登陆定理周期和preperiodic测地线,我们建立了一个更强的Yoccoz不等式排斥不动点这些对应比Yoccoz的经典不等式二次多项式。我们推导出族$\mathcal{F}_a$的连通性轨迹包含在参数空间中的一个特殊的弦子中。

英文摘要:

We develop dynamical theory for the family of holomorphic correspondences $\mathcal{F}_a$ proved by the current authors to be matings between the modular group and parabolic rational maps in the Milnor slice $Per_1(1)$ (in 'Mating quadratic maps with the modular group II'). Such a mating endows the complement of the limit set of $\mathcal{F}_a$ with the geometry of the hyperbolic plane, equipped with the action of the modular group. We introduce bi-infinite coding sequences for geodesics in this complement, utilising continued fraction expressions of end points; we prove landing theorems for periodic and preperiodic geodesics, and we establish a stronger Yoccoz inequality for repelling fixed points of these correspondences than Yoccoz's classical inequality for quadratic polynomials. We deduce that the connectedness locus of the family $\mathcal{F}_a$ is contained in a particular lune in parameter space.

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