Jacques Hadamard (1865-1963) was a French mathematician known for his contributions to various fields, including complex analysis, differential equations, functional analysis, and number theory. He is particularly recognized for the Hadamard transform and Hadamard's inequality, among other significant results. Hadamard also made notable contributions to the theory of partial differential equations and is credited with the development of what is now known as the Hadamard conjecture regarding prime numbers.
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