Mathematician:Jakob Nielsen

Mathematician
Danish mathematician known for his work on automorphisms of surfaces.

Nationality
Danish

History

 * Born: 15 October 1890 in Mjels, Als, Schleswig (now Denmark)
 * Died: 3 August 1959 in Elsinore, Denmark

Theorems and Definitions

 * Fenchel-Nielsen Coordinates (with )
 * Nielsen-Schreier Theorem (with )
 * Nielsen Transformation
 * Nielsen Theory
 * Nielsen-Thurston Classification (with )
 * Nielsen Realization Problem

Publications

 * 2003: Discontinuous groups of isometries in the hyperbolic plane (with )