|Birth Day||August 17, 1922|
|Birth Place||Binningen, Switzerland, Switzerland|
|Age||98 YEARS OLD|
|Died On||5 January 2016(2016-01-05) (aged 93)\nNeuhaus (Schliersee) (de), Germany|
|Alma mater||University of Stuttgart|
|Known for||Haag–Kastler axioms Haag–Łopuszański–Sohnius theorem Haag's theorem Haag–Ruelle scattering theory|
|Awards||Max Planck medal (1970), International Association of Mathematical Physics (1997)|
|Institutions||Max Planck Institute, Princeton University, University of Marseille, University of Illinois at Urbana-Champaign, University of Hamburg|
Haag was born in Tübingen, Germany. He studied Physics at Technische Hochschule Stuttgart, now the University of Stuttgart, from 1948 to 1954 and then worked on his dissertation in Munich. His supervisor was Fritz Bopp.
In 1965 he founded the journal Communications in Mathematical Physics, which he guided as Chief Editor for eight years.
He was awarded the Max Planck medal in 1970 and the Henri Poincaré Prize of the International Association of Mathematical Physics in 1997.
It was reported by SZ Gedenken that Haag died on 5 January 2016 at the age of 93.