数学季刊 ›› 2007, Vol. 22 ›› Issue (4): 592-596.
摘要: Denote by HD(J(f))the Hansdorff dimension of the Julia set J(f)of a rational function f.Our first result asserts that if f is an NCP map,and fn→f horocyclically, preserving sub-critical relations,then fn is an NCP map for all n》0 and J(fn)→J(f)in the Hausdorff topology.We also prove that if f is a parabolic map and fn is an NCP map for all n》0 such that fn→f horocyclically,then J(fn)→J(f) in the Hansdorff topology, and HD(J(fn))→HD(J(f)).
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