Peter Gustav Lejeune Dirichlet


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German mathematician who was professor at the University of Berlin before succeeding Gauss at the University of Göttingen. He proved that in any arithmetic series a, a+d, a+2d,…, where a and d are relatively prime, there are infinitely many primes. He gave the modern definition of a function. In more advanced work, he was concerned to see analysis applied to number theory and mathematical physics.

Subjects: Probability and Statistics.

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