Mathematician:Eduard Helly

Mathematician

Austrian mathematician working mainly in topology and functional analysis.

Proved special cases of the Hahn-Banach Theorem and Banach-Steinhaus Theorem, but remained unrecognised for these at the time.

Nationality

Austrian

History

• Born: 1 June 1884 in Vienna, Austria
• Died: 28 November 1943 in Chicago, Illinois, USA

Theorems and Definitions

• Helly's Selection Theorem
• Helly's Theorem
• Helly-Bray Theorem (with Hubert Evelyn Bray)

• Helly Family
• Helly Metric
• Helly Space

• Results named for Eduard Helly can be found here.

• Definitions of concepts named for Eduard Helly can be found here.

Publications

• 1912: Über lineare Funktionaloperationen (Wien. Ber Vol. 121: pp. 265 – 297)
• 1923: Über Mengen konvexer Körper mit gemeinschaftlichen Punkten (J. Deutsche Math.-Ver Vol. 32: pp. 175 – 176)

Sources

• John J. O'Connor and Edmund F. Robertson: "Eduard Helly": MacTutor History of Mathematics archive