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).
Ludwig Boltzmann
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Ludwig Eduard Boltzmann was an Austrian mathematician and theoretical physicist. His greatest achievements were the development of statistical mechanics and the statistical explanation of the second l
Paul Ehrenfest
…passed the final exams. He majored in chemistry at the Vienna Institute of Technology, but took courses at the University of Vienna, in particular from Ludwig Boltzmann on his kinetic theory of thermodynamics. These lectures had a profound influence: they were instrumental in developing Ehrenfest's interest in theoretical…
Boltzmann in 1902
Ludwig Boltzmann and co-workers in Graz, 1887: (standing, from the left) Nernst, Streintz, Arrhenius, Hiecke, (sitting, from the left) Aulinger, Ettingshausen, Boltzmann, Klemenčič, Hausmanninger
Boltzmann's 1898 I2 molecule diagram showing atomic "sensitive region" (α, β) overlap
Boltzmann's bust in the courtyard arcade of the main building, University of Vienna