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Parapuzzle of the multibrot set and typical dynamics of unimodal maps

Artur Avila, Mikhail Lyubich, Weixiao Shen (2011)

Journal of the European Mathematical Society

We study the parameter space of unicritical polynomials f c : z ↦ z d + c . For complex parameters, we prove that for Lebesgue almost every c , the map f c is either hyperbolic or infinitely renormalizable. For real parameters, we prove that for Lebesgue almost every c , the map f c is either hyperbolic, or Collet–Eckmann, or infinitely renormalizable. These results are based on controlling the spacing between consecutive elements in the “principal nest” of parapuzzle pieces.

Preperiodic dynatomic curves for z ↦ z d + c

Yan Gao (2016)

Fundamenta Mathematicae

The preperiodic dynatomic curve n , p is the closure in ℂ² of the set of (c,z) such that z is a preperiodic point of the polynomial z ↦ z d + c with preperiod n and period p (n,p ≥ 1). We prove that each n , p has exactly d-1 irreducible components, which are all smooth and have pairwise transverse intersections at the singular points of n , p . We also compute the genus of each component and the Galois group of the defining polynomial of n , p .

Puiseux series polynomial dynamics and iteration of complex cubic polynomials

Jan Kiwi (2006)

Annales de l’institut Fourier

We let 𝕃 be the completion of the field of formal Puiseux series and study polynomials with coefficients in 𝕃 as dynamical systems. We give a complete description of the dynamical and parameter space of cubic polynomials in 𝕃 [ ζ ] . We show that cubic polynomial dynamics over 𝕃 and ℂ are intimately related. More precisely, we establish that some elements of 𝕃 naturally correspond to the Fourier series of analytic almost periodic functions (in the sense of Bohr) which parametrize (near infinity) the quasiconformal...

Pulling back cohomology classes and dynamical degrees of monomial maps

Jan-Li Lin (2012)

Bulletin de la Société Mathématique de France

We study the pullback maps on cohomology groups for equivariant rational maps (i.e., monomial maps) on toric varieties. Our method is based on the intersection theory on toric varieties. We use the method to determine the dynamical degrees of monomial maps and compute the degrees of the Cremona involution.

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