Laurent Schwartz

French mathematician. He pioneered the theory of distributions, which gives a well-defined meaning to objects such as the Dirac delta function. He was awarded the Fields medal in 1950 for his work. For a long time he taught at the École polytechnique.

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Source:

1.) Laurent Schwartz (2001). A Mathematician Grappling With His Century. Springer. p. 193. ISBN 9783764360528. "My parents were atheists, I was an atheist, I never really felt Jewish."