Théophile De Donder
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Théophile Ernest De Donder was a Belgian mathematician, physicist and chemist famous for his work in developing correlations between the Newtonian concept of chemical affinity and the Gibbsian concept
De Donder at the 1927 Solvay Conference. Appearing in front of De Donder is Paul Dirac.
Henri Poincaré
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Jules Henri Poincaré was a French mathematician, theoretical physicist, engineer, and philosopher of science. He is often described as a polymath, and in mathematics as "The Last Universalist", since
Plaque on the birthplace of Henri Poincaré at house number 117 on the Grande Rue in the city of Nancy
The young Henri Poincaré in 1887 at the age of 33
The Poincaré family grave at the Cimetière du Montparnasse
Marie Curie and Poincaré talk at the 1911 Solvay Conference.