Konrad Osterwalder

Konrad Osterwalder
Rector of United Nations University (UNU) Rector Emeritus of ETH Zurich
In office
1 September 2007 – 28 February 2013
Preceded byHans van Ginkel
Succeeded byDavid M. Malone
Secretary-GeneralBan Ki-moon
Personal details
Born(1942-06-03)3 June 1942
Frauenfeld, Thurgau, Switzerland
Died19 December 2025(2025-12-19) (aged 83)
Switzerland
Alma materETH Zurich
Known forOsterwalder–Schrader theorem
Jaffe–Lesniewski–Osterwalder cocycle
AwardsETH medal (1970)
ICM Speaker (1983)
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Konrad Osterwalder (3 June 1942 – 19 December 2025) was a Swiss mathematician and physicist, Undersecretary-General of the United Nations, Rector of the United Nations University (UNU), and Rector Emeritus of the Swiss Federal Institute of Technology Zurich (ETH Zurich). He was known for the Osterwalder–Schrader theorem.