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 Moritz Werner Fenchel)
• Nielsen-Schreier Theorem (with Otto Schreier)
• Nielsen Transformation
• Nielsen Theory
• Nielsen-Thurston Classification (with William Paul Thurston)
• Nielsen Realization Problem

Results named for Jakob Nielsen can be found here.

Definitions of concepts named for Jakob Nielsen can be found here.

Publications

• 2003: Discontinuous groups of isometries in the hyperbolic plane (with Moritz Werner Fenchel)

Sources

• John J. O'Connor and Edmund F. Robertson: "Jakob Nielsen": MacTutor History of Mathematics archive