Paul Ehrenfest
Paul Ehrenfest was born on January 18, 1880. See ranking, bio blurb, and everyone else born that day.
About Paul Ehrenfest
Paul Ehrenfest (Austrian German: [ˈpaʊl ˈeːrənfɛst]; 18 January 1880 – 25 September 1933) 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 Ehrenfest theorem. He befriended Albert Einstein on a visit to Prague in 1912 and became a professor in Leiden, where he frequently hosted Einstein. Suffering from depression, in 1933 Ehrenfest killed his disabled son, Wassik, and then himself.