[ The above copyrighted picture is reproduced here by permission: © 2006 Jochen Wilke ]
Niels Fabian Helge von Koch was born in Stockholm on January 25, 1870. He was a student of Mittag-Leffler (1846-1927) at Stockholm University (Stockholms Högskola) whom he succeeded as professor of mathematics in July 1911. Von Koch passed away on March 11, 1924.
In 1906, von Koch described one of the simplest fractal curves (von Koch's snowflake). He is also remembered for having equated (in 1901) Riemann's hypothesis with a strong statement about the distribution of prime numbers.