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Dynamics of holomorphic transformations; Mandelbrot and Julia sets.

5 votes

Clustering of periodic points for a polynomial iteration of $\mathbb{C}$

While Robert Israel's answer is correct, $x^2-2$ is a very exceptional case. In a way, how close do they get is not the interesting question: rather, what gets strange is how far apart do the closest …
Jacques Carette's user avatar
38 votes
Accepted

When does iterating $z \mapsto z^2 + c$ have an exact solution?

No, there are no others. Analytically, one can show that if a Julia set contains an analytic arc, it is in fact a straight line or a circle (up to conjugation). For the class $z^2+c$, $0$ and $-2$ …
Jacques Carette's user avatar
6 votes

Symmetries of the Julia sets for $z^2+c$

Many Julia sets are known to be quasi-self-similar. This means that there is a quasi-conformal map (thus of bounded distortion) which maps parts of the Julia set to the whole. In fact, given any com …
Jacques Carette's user avatar
1 vote
Accepted

Help determining the asymptotic behavior of an integral involving rational functions.

If I understand your problem correctly, i.e. that $\mu$ is the usual metric on the Riemann sphere, then you're asking if essentially all orbits are expansive, at least with respect to that metric. Th …
Jacques Carette's user avatar
1 vote

Dense orbits for a rational map

Even for polynomials, the answer is No: See the question on Smooth Julia Sets for links to papers with more details. Note that for rational functions, there is an additional case, as sometimes the Jul …
Jacques Carette's user avatar
7 votes

Who proved that the Mandelbrot set's Julia sets are locally connected?

If you mean are the Julia sets that correspond to parameter values of the Mandelbrot set connected, then I do believe that both Julia and Fatou proved this (in 1918 and 1916 respectively). are the …
Jacques Carette's user avatar