Complex Dynamics — Julia & Fatou Sets

Mathematics Calculus & Analysis Foundation for Sullivan's dynamics work Cite
Primary: Gaston Julia, Pierre Fatou
Publication: Julia and Fatou sets
Year: 1918
URL: Wikipedia

Description

Iteration of rational maps f: ℂ̂→ℂ̂. Julia set J(f) = closure of repelling periodic points; Fatou set F(f) = ℂ̂ \ J(f) = domain of normality. Fatou components: connected components of F(f). Classification: attracting, parabolic, Siegel disk, Herman ring. Wandering domain: component whose iterates are all disjoint. Montel's theorem: normality criterion. Foundation for Sullivan's no wandering domain theorem.

Source: Wikipedia; Milnor, Dynamics in One Complex Variable

Dependency Flowchart

graph TD DefRat["Def: Rational map\nf: ℂ̂→ℂ̂, deg≥2"] DefNorm["Def: Normal family\nEquicontinuous"] DefJulia["Def: Julia set J(f)\nClosure repelling periodic"] DefFatou["Def: Fatou set F(f)\nℂ̂ \\ J(f)"] DefComp["Def: Fatou component\nConnected component of F(f)"] DefWander["Def: Wandering domain\nIterates disjoint"] ThmMontel["Thm: Montel\n3 omitted values ⇒ normal"] ThmClass["Thm: Classification\nAttracting, parabolic, Siegel, Herman"] LemJNonempty["Lem: J(f) nonempty, no interior"] DefRat --> DefNorm DefNorm --> DefJulia DefJulia --> DefFatou DefFatou --> DefComp DefComp --> DefWander ThmMontel --> DefJulia DefComp --> ThmClass DefJulia --> LemJNonempty classDef definition fill:#b197fc,color:#fff,stroke:#9775fa classDef theorem fill:#51cf66,color:#fff,stroke:#40c057 classDef lemma fill:#74c0fc,color:#fff,stroke:#4dabf7 class DefRat,DefNorm,DefJulia,DefFatou,DefComp,DefWander definition class ThmMontel,ThmClass theorem class LemJNonempty lemma

Color Scheme

Blue Definitions
Teal Theorems
Purple Lemmas

Process Statistics

  • Nodes: 9
  • Edges: 10
  • Definitions: 6
  • Lemmas: 1
  • Theorems: 2