René Eugène Gâteaux (5 May 1889 – 3 October 1914), was a French mathematician. He is known for the Gâteaux derivative. The Gâteaux derivative is a generalization of the concept of directional derivative in differential calculus. It is defined for functions between locally convex topological vector spaces such as Banach spaces.
Gâteaux was killed during World War I. Gâteaux was a fairly well-decorated soldier and was recalled for service in the war. He was killed during a retreat early in the conflict in France.
MORAL OF THE STORY: Do not join the army.