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Theorem

Denjoy-Wolff Theorem

Analysis

The Denjoy-Wolff Theorem, a result in complex analysis and dynamical systems, concerns the fixed points and iteration behavior of holomorphic mappings of the open unit disc in the complex numbers into itself. It was proved independently in 1926 by the French mathematician Arnaud Denjoy and the Dutch mathematician Julius Wolff.

Facts
Statement
Let D be the open unit disk in the complex numbers and f a holomorphic function mapping D into D that is not an automorphism of D. Then there is a unique point z in the closure of D such that the iterates of f tend to z uniformly on compact subsets of D. 1
Proof Year
1926 1
Classification
Statement Form
Existence Theorem 1
Statement Form
Uniqueness Theorem 1
Connections

Has Statement Form

Entity-backed identity for the statement-form enum value this theorem already carries, resolved to a mathematics concept by an explicit value-to-entity map (phase 3 bucket conversion, docs\design_entity_backed_browse_buckets_20260928.md). The statement-form fact itself stays on the theorem unchanged.

Entity-backed identity for the statement-form enum value this theorem already carries, resolved to a mathematics concept by an explicit value-to-entity map (phase 3 bucket conversion, docs\design_entity_backed_browse_buckets_20260928.md). The statement-form fact itself stays on the theorem unchanged.

In Branch

Source Denjoy-Wolff theorem (Wikipedia)
Sources
1. Denjoy-Wolff theorem (Wikipedia)
  • Statement
    Then there is a unique point z in the closure of D such that the iterates of f tend to z uniformly on compact subsets of D
  • Introduction
    proved independently in 1926
  • In Branch: Complex Analysis, Lead sentence
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