Mathematician:Gerhard Ringel

German mathematician who was one of the pioneers in the field of graph theory.

Nationality
German

History

 * Born: October 28, 1919, Kollnbrunn, Austria
 * Died: June 24, 2008, Santa Cruz, California

Theorems and Definitions

 * Ringel-Youngs Theorem (with John William Theodore Youngs)

Publications

 * 1990: (with Nora Hartsfield)