Quasisymmetric Uniformization And Hausdorff Dimensions Of Cantor Circle Julia Sets
TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY(2021)
摘要
For Cantor circle Julia sets of hyperbolic rational maps, we prove that they are quasisymmetrically equivalent to standard Cantor circles (i.e., connected components are round circles). This gives a quasisymmetric uniformization of all Cantor circle Julia sets of hyperbolic rational maps.By analyzing the combinatorial information of the rational maps whose Julia sets are Cantor circles, we give a computational formula of the number of the Cantor circle hyperbolic components in the moduli space of rational maps for any fixed degree.We calculate the Hausdorff dimensions of the Julia sets which are Cantor circles, and prove that for any Cantor circle hyperbolic component H in the space of rational maps, the infimum of the Hausdorff dimensions of the Julia sets of the maps in H is equal to the conformal dimension of the Julia set of any representative f(0) is an element of H, and that the supremum of the Hausdorff dimensions is equal to 2.
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关键词
Julia sets, Hausdorff dimension, quasisymmetric uniformization, Cantor circles, hyperbolic components
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