Condition for Connectedness of Julia Set of z^2 + c
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Theorem
Let $J$ be the Julia set of the rational function on $\overline C$ defined as:
- $\forall z \in \overline C: z \mapsto z^2 + c$
for some constant $c \in \overline C$.
Then $J$ is connected in $\overline C$ if and only if $c$ is an element of the Mandelbrot set.
Proof
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Sources
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): Julia set
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): Julia set