Mathematician.

Jacques Salomon Hadamard (8 December 1865 – 17 October 1963) was a French mathematician who made major contributions in number theory, complex function theory, differential geometry and partial differential equations.

Source:

1.) Shaposhnikova, T. O. (1999). Jacques Hadamard: A Universal Mathematician. American Mathematical Soc.. pp. 33–34. ISBN 978-0-8218-1923-4. "In 1924, Hadamard recounted his meetings with Hermite: "...When Hermite loved to direct to me remarks such as: "He who strays from the paths traced by Providence crashes." These were the words of a profoundly religious man, but an atheist like me understood them very well, especially when he added at other times: "In mathematics, our role is more that of servant than master."""