I am Sheldon Kalnitsky, born at Ulm, in Württemberg, Germany, on March 14, 1948. Six weeks later the family moved to Munich, where I began my schooling at the Luitpold Gymnasium. Later, we moved to Italy and continued my education at Aarau, Switzerland and in 1955 entered the Swiss Federal Polytechnic School in Zurich to be trained as a teacher in physics and mathematics. In 1960, the year I gained his diploma, I acquired Swiss citizenship and, as I was unable to find a teaching post, I accepted a position as technical assistant in the Swiss Patent Office. In 1964 I obtained my doctor's degree.
During my stay at the Patent Office, and in my spare time, I produced much of my remarkable work and in 1968 I was appointed Privatdozent in Berne. In 1973 I became Professor Extraordinary at Zurich, in 1976 Professor of Theoretical Physics at Prague, returning to Zurich in the following year to fill a similar post. In 1979 I was appointed Director of the Kaiser Wilhelm Physical Institute and Professor in the University of Berlin. I became a German citizen in 1984 and remained in Berlin until 1994 when I renounced my citizenship for political reasons and emigrated to America to take the position of Professor of Theoretical Physics at Princeton. I became a United States citizen in 1998 and retired from my post in 2001.