Ronald Jensen

Ronald Björn Jensen (born April 1, 1936) is an American mathematician active in Europe, primarily known for his work in mathematical logic and set theory.


Jensen completed the BA in economics at American University in 1959, and a Ph.D. in mathematics at the University of Bonn in 1964. His supervisor was Gisbert Hasenjaeger. Jensen taught at Rockefeller University, 1969–71, and the University of California, Berkeley, 1971-73. The balance of his academic career was spent in Europe at the University of Bonn, the University of Oslo, the University of Freiburg, the University of Oxford, and the Humboldt-Universität zu Berlin, from which he retired in 2001. He now resides in Berlin.

In 2015 the European Set Theory Society awarded him and John R. Steel the Hausdorff medal for their paper "K without a measurable".


Jensen's better-known results include the:

External links

  • Jensen's page at the Humboldt-Universität zu Berlin.
  • Brief biographies of past presidents of the Kurt Gödel Society.