Richard Dedekind

Julius Wilhelm Richard Dedekind (; German: [ˈdeːdəˌkɪnt]; 6 October 1831 – 12 February 1916) was a German mathematician who made important contributions to number theory, abstract algebra (particularly ring theory), and the axiomatic foundations of arithmetic. His best known contribution is the definition of real numbers through the notion of Dedekind cut. He is also considered a pioneer in the development of modern set theory and of the philosophy of mathematics known as logicism.

Notable works: Stetigkeit und Irrationale Zahlen, Was sind und was sollen die Zahlen?, Uber die Theorie der ganzen algebraischen Zahlen, Dedekind cut, Dedekind's isomorphism theorem, Dedekind domain, Dedekind–Kummer theorem, construction of the real numbers Education: University of Göttingen, Frederick William University Berlin, Collegium Carolinum, Martino-Katharineum

Source: Wikipedia — https://en.wikipedia.org/wiki/Richard_Dedekind