He belonged to a group of friends and scientists that notably included Pierre and Marie Curie, Paul Langevin, Jean Perrin, and the mathematician Émile Borel.
This is a fundamental result for the hyperbolic theory which was demonstrated later by other approaches by Robb (1911) and Borel (1913).
Émile Zola | Émile Durkheim | Emile Clement | Émile Bernard | Paul-Émile Botta | Emile Vandervelde | Émile Loubet | Emile Lahoud | Émile Coué | The Life of Emile Zola | Jacques-Émile Blanche | Émile Vuillermoz | Emile Hirsch | Emile Griffith | Emile Francis | Émile Dewoitine | Emile de Antonio | Émile Blanchard | Emile | Borel | Émile Wartel | Émile Moreau | Emile Haynie | Émile Coué's | Emile Claus | Émile Chartier | Émile Bravo | Émile Borel | Émile Baudot | Émile Basly |