Jules Henri Poincaré (] ; 29 April 1854 – 17 July 1912) 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" by Eric Temple Bell, since he excelled in all fields of the discipline as it existed during his lifetime.
Eric Temple Bell described his friend Poincare as the last universalist that excelled in all fields of the discipline during his lifetime.
Eric Bell did say that Poincare was the last universalist but it doesn't say that they were friends or that they even knew each other. 