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arXiv 0811.2236math.DSmath.GT
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双曲三维流形上的Apollonian圆填充与闭半球

Apollonian circle packings and closed horospheres on hyperbolic 3-manifolds

Alex Kontorovich, Hee Oh

摘要:

我们得到了在任意给定的有界Apollonian圆填充中曲率不超过T的圆的个数的一个渐近公式。对于积分填充,我们得到了具有素曲率的圆的数目以及具有素曲率的圆对的数目的上界,它们是常数的倍数。我们证明的主要内容是几何有限双曲三维流形上的膨胀球面在其基本群的临界指数大于1的条件下的有效等分布。

英文摘要:

We obtain an asymptotic formula for the number of circles of curvature at most T in any given bounded Apollonian circle packing. For an integral packing, we obtain the upper bounds for the number of circles with prime curvature as well as of pairs of circles with prime curvatures, which are sharp up constant multiples. The main ingredient of our proof is the effective equidistribution of expanding horospheres on geometrically finite hyperbolic 3-manifolds under the assumption that the critical exponent of its fundamental group exceeds one.

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