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arXiv 1002.0996math.GTmath.GR
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Kleinian群的Cannon-Thurston映射

Cannon-Thurston Maps for Kleinian Groups

Mahan Mj

摘要:

我们证明了Cannon-Thurston映射对于不含抛物线的退化自由群,即对于非线性体群是存在的.结合这些技术与早期的工作证明存在的Cannon-Thurston映射的表面组,我们表明,Cannon-Thurston映射存在于任意生成的Kleinian群没有抛物线,证明图的Thurston和McMullen。我们还表明,点下的Cannon-Thurston映射的原像退化自由群没有抛物线对应的结束点的叶子的结束层在Masur域,每当一个点有一个以上的原像。这证明了Otal的一个猜想。我们还证明了一个类似的结果,点预图像下的Cannon-Thurston映射的任意生成的Kleinian群没有抛物线。

英文摘要:

We show that Cannon-Thurston maps exist for degenerate free groups without parabolics, i.e. for handlebody groups. Combining these techniques with earlier work proving the existence of Cannon-Thurston maps for surface groups, we show that Cannon-Thurston maps exist for arbitrary finitely generated Kleinian groups without parabolics, proving conjectures of Thurston and McMullen. We also show that point pre-images under Cannon-Thurston maps for degenerate free groups without parabolics correspond to end-points of leaves of an ending lamination in the Masur domain, whenever a point has more than one pre-image. This proves a conjecture of Otal. We also prove a similar result for point pre-images under Cannon-Thurston maps for arbitrary finitely generated Kleinian groups without parabolics.

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