Mathematician:Hanna Neumann

Full maiden name: Johanna von Caemmerer.

German-born mathematician active in the field of group theory.

Wife of Bernhard Neumann and mother of Peter M. Neumann.

Nationality
German

History

 * Born: 12 February 1914 in Lankwitz, Berlin, Germany
 * 1938: Moved to England to marry Bernhard Neumann.
 * 1940: Gave birth to Peter Michael Neumann.
 * Died: 14 November 1971 in Ottawa, Canada

Theorems and Definitions

 * HNN Extension (named after Graham Higman, Bernhard Neumann and Hanna Neumann)

Books and Papers

 * 1949: Embedding theorems for groups (with Graham Higman and Bernhard Neumann)
 * 1967: Varieties of Groups