Some counterexamples in dynamics of rational semigroups

Details Some counterexamples in dynamics of rational semigroups Some counterexamples in dynamics of rational semigroups

2007-08-25

arxiv.org/abs/0708.3434v1

Ann. Acad. Sci. Fenn. Math. 29 (2004), no. 2, 357--366

Mathematics

Dynamical Systems

13 pages

Scientific paper

We give an example of two rational functions with non-equal Julia sets that generate a rational semigroup whose completely invariant Julia set is a closed line segment. We also give an example of polynomials with unequal Julia sets that generate a non nearly Abelian polynomial semigroup with the property that the Julia set of one generator is equal to the Julia set of the semigroup. These examples show that certain conjectures in the field of dynamics of rational semigroups do not hold as stated and therefore require the allowance of certain exceptional cases.

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