Category:Paul Ehrenfest

**Paul Ehrenfest**
	Austrian and Dutch theoretical physicist Paul Ehrenfest
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Name in native language	Paul Ehrenfest;
Date of birth	18 January 1880; Vienna
Date of death	25 September 1933; Amsterdam
Manner of death	suicide;
Cause of death	ballistic trauma;
Country of citizenship	Kingdom of the Netherlands; Austria;
Educated at	Technische Hochschule; University of Vienna; University of Göttingen (1901–1903); Akademisches Gymnasium;
Doctoral advisor	Ludwig Boltzmann (University of Vienna, 1904);
Doctoral student	Jan Burgers (1918); Jan Tinbergen (1929); Hans Kramers (1919); Dirk Coster (1922); George Uhlenbeck (1927); Samuel Goudsmit (1927); Hendrik Casimir (1931); Alexander Friedmann; Yurii Aleksandrovich Krutkov; Arend Joan Rutgers; Jan Tresling; Roelof Luppo Krans; Henri Florin;
Occupation	physicist; theoretical physicist; university teacher; mathematician;
Employer	Leiden University (Faculteit der Wiskunde en Natuurwetenschappen, Dutch ordinary professor, 1912–1933);
Member of	Academy of Sciences of the USSR; Russian Society of Physics and Chemistry; Royal Netherlands Academy of Arts and Sciences; Russian Academy of Sciences;
Position held	professor;
Field of work	theoretical physics;
Native language	German;
Child	Tatyana Pavlovna Ehrenfest; Galinka Ehrenfest;
Spouse	Tatyana Afanasyeva (1906–);
Relative	Hugo Ehrenfest;
Notable work	Ehrenfest theorem; Ehrenfest paradox; Ehrenfest model; Ehrenfest equations; Ehrenfest–Tolman effect;
Authority file
	Q84227; ISNI: 0000000109156958; VIAF ID: 73937593; GND ID: 118681737; Library of Congress authority ID: n83826301; Bibliothèque nationale de France ID: 12399856t; IdRef ID: 033097518; Libraries Australia ID: 36427577; Biografisch Portaal van Nederland ID: 16978462; NL CR AUT ID: mub2011658338; National Library of Israel ID (old): 000458696; National Library of Spain ID: XX5240934; Nationale Thesaurus voor Auteursnamen ID: 069739676; NORAF ID: 3122189; NUKAT ID: n98005524; NLP ID (old): a0000003697569; PLWABN ID: 9810564727205606; National Library of Israel J9U ID: 987007277249905171; NACSIS-CAT author ID: DA06117758; Open Library ID: OL338727A; Mathematics Genealogy Project ID: 19433
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English: Paul Ehrenfest (January 18, 1880 – September 25, 1933) was an Austrian physicist and mathematician, who obtained Dutch citizenship on March 24, 1922. He made major contributions to the field of statistical mechanics and its relations with quantum mechanics, including the theory of phase transition and the Ehrenfest theorem.

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