1831 – 1916
Richard Dedekind was a 19th-century German mathematician known for his foundational contributions to abstract algebra, algebraic number theory, and the rigorous definition of real numbers. His construction of real numbers via 'Dedekind cuts' provided a rigorous foundation for analysis, and his work on ideals transformed modern algebra.
Developed Dedekind cuts to rigorously define real numbers
Formulated the Dedekind-Peano axioms for natural numbers
Introduced the theory of ideals in algebraic number theory
Authored 'Was sind und was sollen die Zahlen?' on the foundations of arithmetic
Advanced the logicist and structuralist approach to mathematics