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We investigate the dynamics of semigroups generated by a family of polynomial maps on the Riemann sphere such that the postcritical set in the complex plane is bounded. Moreover, we investigate the associated random dynamics of polynomials.…

Dynamical Systems · Mathematics 2007-11-26 Hiroki Sumi

We discuss the dynamic and structural properties of polynomial semigroups, a natural extension of iteration theory to random (walk) dynamics, where the semigroup $G$ of complex polynomials (under the operation of composition of functions)…

Dynamical Systems · Mathematics 2011-05-11 Rich Stankewitz , Hiroki Sumi

We investigate the dynamics of polynomial semigroups (semigroups generated by a family of polynomial maps on the Riemann sphere) and the random dynamics of polynomials on the Riemann sphere. Combining the dynamics of semigroups and the…

Dynamical Systems · Mathematics 2011-01-20 Hiroki Sumi

We investigate the dynamics of semigroups generated by polynomial maps on the Riemann sphere such that the postcritical set in the complex plane is bounded. Moreover, we investigate the associated random dynamics of polynomials.…

Dynamical Systems · Mathematics 2014-02-26 Hiroki Sumi

We investigate the dynamics of $2$-generator semigroups of polynomials with bounded planar postcritical set and associated random dynamics on the Riemann sphere. Also, we investigate the space ${\cal B}$ of such semigroups. We show that for…

Dynamical Systems · Mathematics 2016-01-07 Hiroki Sumi

In this paper, we prove that for any post-critically finite rational map $f$ on the Riemann sphere $\overline{\mathbb{C}}$, and for each sufficiently large integer $n$, there exists a finite and connected graph $G$ in the Julia set of $f$…

Dynamical Systems · Mathematics 2024-11-26 Guizhen Cui , Yan Gao , Jinsong Zeng

We study the dynamics of an arbitrary semigroup of transcendental entire functions using Fatou-Julia theory. Several results of the dynamics associated with iteration of a transcendental entire function have been extended to transcendental…

Dynamical Systems · Mathematics 2015-10-08 Dinesh Kumar , Sanjay Kumar

We discuss the dynamics of semigroups of transcendental entire functions using Fatou-Julia theory and provide a condition for the complete invariance of escaping set and Julia set of transcendental semigroups. Results regarding limit…

Dynamical Systems · Mathematics 2016-03-16 Dinesh Kumar , Sanjay Kumar , Kin Keung Poon

The goal of this paper is to study some basic properties of the Fatou and Julia sets for a family of holomorphic endomorphisms of $\mathbb{C}^k,\; k \ge 2$. We are particularly interested in studying these sets for semigroups generated by…

Dynamical Systems · Mathematics 2015-08-27 Sayani Bera , Ratna Pal

We have introduced the notion of the bungee set and the filled Julia set of a transcendental semigroup using Fatou-Julia theory. Numerous results of the bungee set of a single transcendental entire function have been generalized to a…

Dynamical Systems · Mathematics 2025-10-13 Manisha Kumari , Dinesh Kumar

We investigate the random dynamics of polynomial maps on the Riemann sphere and the dynamics of semigroups of polynomial maps on the Riemann sphere. In particular, the dynamics of a semigroup $G$ of polynomials whose planar postcritical set…

Dynamical Systems · Mathematics 2015-03-16 Hiroki Sumi

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…

Dynamical Systems · Mathematics 2007-08-28 Rich Stankewitz , Toshiyuki Sugawa , Hiroki Sumi

Let f be a transcendental entire map that is subhyperbolic, i.e., the intersection of the Fatou set F(f) and the postsingular set P(f) is compact and the intersection of the Julia set J(f) and P(f) is finite. Assume that no asymptotic value…

Dynamical Systems · Mathematics 2014-09-16 Helena Mihaljevic-Brandt

We consider fiber-preserving complex dynamics on fiber bundles whose fibers are Riemann spheres and whose base spaces are compact metric spaces. In this context, without any assumption on (semi-)hyperbolicity, we show that the fiberwise…

Dynamical Systems · Mathematics 2007-05-23 Hiroki Sumi

Let $f$ be a rational map with degree $d\geq 2$ whose Julia set is connected but not equal to the whole Riemann sphere. It is proved that there exists a rational map $g$ such that $g$ contains a buried Julia component on which the dynamics…

Dynamical Systems · Mathematics 2020-02-28 Youming Wang , Fei Yang

We investigate the dynamics of semigroups of rational maps on the Riemann sphere. To establish a fractal theory of the Julia sets of infinitely generated semigroups of rational maps, we introduce a new class of semigroups which we call…

Dynamical Systems · Mathematics 2017-02-28 Johannes Jaerisch , Hiroki Sumi

We define commutator of a transcendental semigroup, and on the basis of this concept, we define conjugate semigroup. We prove that the conjugate semigroup is nearly abelian if and only if the given semigroup is nearly abelian. We also prove…

Dynamical Systems · Mathematics 2018-08-13 Bishnu Hari Subedi , Ajaya Singh

Many authors have studied the dynamics of hyperbolic transcendental entire functions; these are those for which the postsingular set is a compact subset of the Fatou set. Equivalenty, they are characterized as being expanding.…

Dynamical Systems · Mathematics 2021-07-01 Leticia Pardo-Simón

For a sequence of complex parameters $\{c_n\}$ we consider the compositions of functions $f_{c_n} (z) = z^2 + c_n$, which is the non-autonomous version of the classical quadratic dynamical system. The definitions of Julia and Fatou sets are…

Dynamical Systems · Mathematics 2021-07-01 Krzysztof Lech , Anna Zdunik

We mainly generalize the notion of abelian transcendental semigroup to nearly abelian transcendental semigroup. We prove that Fatou set, Julia set and escaping set of nearly abelian transcendental semigroup are completely invariant. We…

Dynamical Systems · Mathematics 2018-08-03 Bishnu Hari Subedi , Ajaya Singh
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