Paul Sophus Epstein (Warsaw, then part of Imperial Russia, now Poland, March 20, 1883–Pasadena, February 8, 1966) is a Russian- American mathematician/physicist. He is known for his contributions to the development of quantum mechanics. Warsaw (Polish: , , in full The Capital City of Warsaw, Polish: Miasto StoÅ‚eczne Warszawa) is the capital of Poland and its largest city. ... Imperial Russia is the term used to cover the period of history from the expansion of Russia under Peter the Great, through the expansion of the Russian Empire from the Baltic Sea to the Pacific Ocean, to the deposal of Nicholas II of Russia, the last tsar, at the start... March 20 is the 79th day of the year in the Gregorian Calendar (80th in Leap years). ... 1883 (MDCCCLXXXIII) was a common year starting on Monday (see link for calendar). ... Pasadena is a city in Los Angeles County, California, United States. ... February 8 is the 39th day of the year in the Gregorian Calendar. ... 1966 (MCMLXVI) was a common year starting on Saturday (the link is to a full 1966 calendar). ... Leonhard Euler is considered by many to be one of the greatest mathematicians of all time A mathematician is the person whose primary area of study and research is the field of mathematics. ... ... Fig. ...

Paul Epstein's parents, Siegmund Simon Epstein and Sarah Sophia Epstein were of a middle class Jewish family. He went to the Hochschule in Minsk, and from 1901-1905 studied mathematics and physics at the Imperial University of Moscow under Pyotr Nikolaevich Lebedev. In 1909 he graduated, and became a Privatdozent at the University of Moscow. In 1910 he went to Munich, Germany, to do research under Arnold Sommerfeld, who was his advisor, and Epstein was granted a Ph.D.^[1] from the Technische Universität München, in 1914.^[2] At the outbreak of World War I he was in Munich, and considered an "enemy alien". Thanks to Sommerfeld's intervention he was allowed to stay in Munich as a private citizen, and could continue with his research. By that time Epstein became interested in the quantum theory of atomic structure. After the war he went to Leiden, to become Hendrik Lorentz' and Paul Ehrenfest's assistant. In 1921 he was recruited by Robert Millikan to come to the California Institute of Technology, where he remained for the rest of his career. For other uses, see Jew (disambiguation). ... The education system in Germany has a long tradition of compulsory state schools. ... Location Location of Minsk, shown within the Minsk Voblast Government Country Subdivision Belarus Minsk Founded 1067 Mayor Mikhail Pavlov Geographical characteristics Area  - City 305. ... Euclid, Greek mathematician, 3rd century BC, known today as the father of geometry; shown here in a detail of The School of Athens by Raphael. ... Physics (from the Greek, (phúsis), nature and (phusiké), knowledge of nature) is the science concerned with the discovery and understanding of the fundamental laws which govern matter, energy, space, and time. ... Moscow State University M.V. Lomonosov Moscow State University (Russian: Московский государственный университет имени Ðœ.Ð’.Ломоносова, often abbreviated МГУ, MSU, MGU) is the largest and arguably the oldest university in Russia, founded in 1755. ... Pyotr Nikolaevich Lebedev (Russian: ) was a promiment Russian physicist. ... Privatdozent (PD or Priv. ... Location Position of Moscow in Europe Government Country District Subdivision Russia Central Federal District Federal City Mayor Yuriy Luzhkov Geographical characteristics Area  - City 1,081 km² Population  - City (2005)    - Density 10,415,400   8537. ... Munich: Frauenkirche and Town Hall steeple Munich: St. ... Arnold Johannes Wilhelm Sommerfeld (December 5, 1868 in Königsberg, East Prussia – April 26, 1951 in Munich, Germany) was a German physicist who introduced the fine-structure constant in 1919. ... Munich University of Technology, or Technical University of Munich (TUM) (German: Technische Universität München, TUM), is a major German university, located in Munich (and the towns of Garching and Weihenstephan out of Munich). ... Combatants Allied Powers: Russian Empire France British Empire Italy United States Central Powers: Austria-Hungary German Empire Ottoman Empire Bulgaria Commanders Nicholas II Aleksei Brusilov Georges Clemenceau Joseph Joffre Ferdinand Foch Herbert Henry Asquith Douglas Haig John Jellicoe Victor Emmanuel III Luigi Cadorna Armando Diaz Woodrow Wilson John Pershing Franz... Quantum theory is a theory of physics that uses Plancks constant. ... Properties For alternative meanings see atom (disambiguation). ... Leyden redirects here. ... Painting of Hendrik Lorentz by Arnhemensis Hendrik Antoon Lorentz (July 18, 1853, Arnhem – February 4, 1928, Haarlem) was a Dutch physicist and the winner of the 1902 Nobel Prize in Physics for his work on electromagnetic radiation. ... Paul Ehrenfest Paul Ehrenfest (Vienna, January 18, 1880 – Amsterdam, September 25, 1933) was an Austrian physicist and mathematician, who obtained Dutch citizenship on March 24, 1922. ... Year 1921 (MCMXXI) was a common year starting on Saturday (see link for full calendar). ... Robert Andrews Millikan (March 22, 1868 – December 19, 1953) was an American experimental physicist who won the 1923 Nobel Prize for his measurement of the charge on the electron and for his work on the photoelectric effect. ... The California Institute of Technology (commonly referred to as Caltech)[1] is a private, coeducational university located in Pasadena, California, in the United States. ...

Notes

1. ^ Dissertation title: Diffraction from a Plane Screen.
2. ^ P. S. Epstein - Mathematics Genealogy Project.

See also

• Stark effect

The Stark effect is the splitting of a spectral line into several components in the presence of an electric field. ...

External links

• Jesse W.M. DuMond, Paul Sophus Epstein, Biographical Memoirs V.45 (1974), National Academy of Sciences (NAS)
• Caltech Archives Oral Histories Online Interview with Paul S. Epstein