Mathematician:Hanna Neumann

Full maiden name: Johanna von Caemmerer.

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

Wife of and mother of.

Nationality
German

History

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

Theorems and Definitions

 * HNN Extension (named after, and )

Books and Papers

 * 1949: Embedding theorems for groups (with and )
 * 1967: Varieties of Groups