Paul Erdős (March 26, 1913 – September 20, 1996) was a prominent Hungarian mathematician who is believed to have had Asperger's Syndrome. He is featured in Genius Genes: How Asperger Talents Changed the World by Michael Fitzgerald and Brendan O’Brien, and in the early 40s Stanisław Ulam described him in the following way: "Erdős is somewhat below medium height, an extremely nervous and agitated person... almost constantly jumping up and down or flapping his arms. His eyes indicated he was always thinking about mathematics, a process interrupted only by his rather pessimistic statements on world affairs, politics, or human affairs in general, which he viewed darkly. If some amusing thought occurred to him, he would jump up, flap his hands, and sit down again." Paul Erdős was an extremely prolific writer (he wrote around 1,500 mathematical papers) and is famous for his excellent work in discrete mathematics, graph theory, number theory, mathematical analysis, approximation theory, set theory, and probability theory. He also contributed to the Ramsey theory. Read more about this outstanding mathematician on his Wikipedia page.