A new proof of a conjecture of Yoccoz, Remarks, New results

Details A new proof of a conjecture of Yoccoz, Remarks, New results A new proof of a conjecture of Yoccoz, Remarks, New results

2006-04-21

arxiv.org/abs/math/0604470v2

Mathematics

Dynamical Systems

10 pages

Scientific paper

We give a new proof of the following conjecture of Yoccoz: the sum of the logarithm of the conformal radius of fixed Siegel disks of monic quadratic polynomials and of the Brjuno function of their rotation number is bounded from above. In a former article we obtained a first proof based on the control of parabolic explosion. Here, we present a more elementary proof based on Yoccoz's initial methods. We then extend this result to some new families of polynomials such as unicritical ones. We also show that the conjecture does not hold for some other families of polynomials.

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