Paul Ehrenfest
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Paul Ehrenfest was an Austrian theoretical physicist who made major contributions to statistical mechanics and its relation to quantum mechanics, including the theory of phase transition and the Ehren
Ehrenfest, c. 1910s
Ehrenfest's students, Leiden 1924. Left to right: Gerhard Heinrich Dieke, Samuel Abraham Goudsmit, Jan Tinbergen, Paul Ehrenfest, Ralph Kronig, and Enrico Fermi
Niels Bohr and Albert Einstein debating quantum theory at Ehrenfest's home in Leiden (December 1925).
Tatyana Afanasyeva-Ehrenfest
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Tatyana Alexeyevna Afanasyeva-Ehrenfest was a Russian-Dutch mathematician and physicist who made contributions to the fields of statistical mechanics and statistical thermodynamics with her husband Pa
Paul Ehrenfest
…transferred to University of Göttingen, which until 1933 was an important site for mathematics and theoretical physics. There he met his future wife, Tatyana Afanasyeva, a young mathematician born in Kiev (then the capital of the Kiev Governorate, Russian Empire) and educated in St Petersburg. In 1903, he met Dutch…
Tatyana Afanasyeva c. 1910
St. Petersburg circle of physicists. Sitting (from left to right): Paul Ehrenfest, Abram Ioffe, Dmitry Rozhdestvensky, Tatyana Afanasyeva. Standing (from left to right): Vladimir Chulanovsky, G. Weichardt, L. Isakov, G. Perlitz, Victor Robertovich Bursian, Jadwiga Szmidt
Albert Einstein standing between Paul jr. and Galinka Ehrenfest outside their house in Leiden, late 1920s or early 1930s