Eduard Helly
was born 134 years ago
1st June 1884

Eduard Helly worked on functional analysis and proved the Hahn-Banach theorem in 1912 fifteen years before Hahn published essentially the same proof and 20 years before Banach gave his new setting.


Find out more at:
http://www-history.mcs.st-andrews.ac.uk/Biographies/Helly.html