Julia set
In the context of complex dynamics, a topic of mathematics, the Julia set and the Fatou set are two complementary sets (Julia 'laces' and Fatou 'dusts') defined from a function.
Description
Informally, the Fatou set of the function consists of values with the property that all nearby values behave similarly under repeated iteration of the function, and the Julia set consists of values such that an arbitrarily small perturbation can cause drastic changes in the sequence of iterated function values. Thus the behavior of the function on the Fatou set is 'regular', while on the Julia set its behavior is 'chaotic'.
The Julia set of a function f is commonly denoted J(f), and the Fatou set is denoted F(f).<ref>Note that for other areas of mathematics the notation J(f) can also represent the Jacobian matrix of a real valued mapping f between smooth manifolds.</ref> These sets are named after the French mathematicians Gaston Julia<ref>Gaston Julia (1918) "Mémoire sur l'iteration des fonctions rationnelles," Journal de Mathématiques Pures et Appliquées, vol. 8, pages 47–245.</ref> and Pierre Fatou<ref>Pierre Fatou (1917) "Sur les substitutions rationnelles," Comptes Rendus de l'Académie des Sciences de Paris, vol. 164, pages 806-808 and vol. 165, pages 992–995.</ref> whose work began the study of complex dynamics during the early 20th century.
See also
- Complement set
- Complex dynamics
- [[Function (mathematics)
- Mathematics
External links
- Julia set @ Wikipedia
