Hans Hahn
Hans Hahn (
September 27,
1879 -
July 24,
1934) was an
Austrian mathematician who made many contributions to
functional analysis,
topology,
set theory, the
calculus of variations,
real analysis, and
order theory. He was a student at the Technische Hochschule in Vienna.
He also studied in
Strasbourg,
Munich and
Göttingen. He was appointed to the teaching staff in Vienna in
1905 and he became professor of mathematics there in
1921. In session 1905-06 Hahn substituted for Otto Stolz at Innsbruck.
He was also actively interested in philosophy, being a member of the
Vienna Circle of logical Positivists, a discussion group of gifted scientists and philosophers who met regularly in Vienna..
Hahn's contributions to mathematics include the famous
Hahn-Banach theorem and (independently of Banach and Steinhaus) the
uniform boundedness principle. Other theorems are the
Hahn decomposition theorem, the
Vitali-Hahn-Saks theorem, the
Hahn-Mazurkiewicz theorem and the
Hahn embedding theorem.
*
