Hans Hahn

Hans Hahn (1879 - 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 also actively interested in philosophy, being a member of the Vienna Circle.

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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.

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1879: 1879 was a common year starting on Wednesday (see link for calendar)....

1934: 1934 was a common year starting on Monday (link will take you to calendar)....

Austria: The Republic of Austria (German: Republik ?sterreich) is a landlocked country in central Europe. It borders Germany and the Czech Republic to the north, Slovakia and Hungary to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the west. The capital is the city of Vienn...

Hans Hahn related Images and Photos (experimental)

Petrole Hahn 1910	Portrait of Hans Holbein	Thich Nhat Hahn 2012 Mini Wall Calendar	Portrait of Hans Christian Andersen
Hans Holbein the Younger Engraved by Bartholomaus Huebner 1790	Portrait Miniature of Count Hans Axel Von Fersen (1755-1810)	The Artist at Work Painting Hans Sachs	The King Makes a Promise to Hans the Hedgehog
Apparatus For Healing Arm Fractures Feldtbuch Der Wundartzney Hans Von Gersdorff c.1540	Amputation Illustration from Feldtbuch Der Wundartzney by Hans Von Gersdorff c.1540	The Old Witch Combing Gerda's Hair in 'The Snow Queen' from Hans Christian Andersen's Fairy Tales	Edith Erastoff and Victor Sjöström: Berg-Ejvind Och Hans Hustru 1918