Special Session 6: Special session on Fractal Geometry, Dynamical Systems, and Their Applications

On the stochastic bifurcations regarding random iterations of polynomials of the form $z^2+c_n$

Takayuki Watanabe
Chubu University
Japan
Co-Author(s):    
Abstract:
We consider random iterations of polynomial maps $z^2+c_n$ where $c_n$ are complex-valued independent random variables following the uniform distribution on the closed disk with center $c$ and radius $r$. The aim of this talk is twofold. First, we study the (dis)connectedness of random Julia sets. Here, we reveal the relationships between the bifurcation radius and connectedness of random Julia sets. Second, we investigate the bifurcation of our proposed random iterations and give quantitative estimates of bifurcation parameters. In particular, we prove that for the central parameter $c=-1$, almost every random Julia set is totally disconnected with much smaller radial parameters $r$ than expected.