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arXiv · 2410.16728

Cubic polynomials with a 2-cycle of Siegel disks

Yuming Fu·Jun Hu·Oleg Muzician
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Abstract

Under conjugation by affine transformations, the dynamical moduli space of cubic polynomials $f$ with a $2$-cycle of Siegel disks is parameterized by a three-punctured complex plane as a degree-$2$ cover. Assuming the rotation number of $f^2$ on the Siegel disk is of bounded type, we show that on the three-punctured complex plane, the locus of the cubic polynomials with both finite critical points on the boundaries of the Siegel disks on the $2$-cycle is comprised of two arcs, corresponding to the cases with two critical points on the boundary of the same Siegel disk, and a Jordan curve, corresponding to the cases with two critical points on the boundaries of different Siegel disks.

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Yuming Fu, Jun Hu, Oleg Muzician. 2024-10-22. Cubic polynomials with a 2-cycle of Siegel disks. https://arxiv.org/abs/2410.16728

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