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Romanian mathematician, author, educator. He studied partial differential equations. Romania 2613
Dedekind was born in Brunswick, the birthplace of Gauss, and received his degree under Gauss at Göttingen. He studied with Dirichlet and was a close friend of Riemann. Dedekind's construction of the real numbers using `Dedekind cuts' was part of the effort of Dedekind, Cantor, and Weierstrass, and others to bring a rigor to analysis. Dedekind summarized this work in his book Was sind und was sollen die Zahlen? (What are the numbers and what do they mean?). These contributions, called part of the arithmetization of analysis, illustrate Dedekind's arithmetic and algebraic viewpoint. In algebraic number theory Dedekind introduced his theory of ideals to restore unique factorization; today integral domains in which every ideal is a unique product of prime ideals are called Dedekind domains. The GDR stamp presents an ideal written as a product of prime ideals.
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