Boris Delaunay

Boris Nikolaevich Delone (Russian Борис Николаевич Делоне, * 3 Märzjul / March 15 1890greg in Saint Petersburg, .. † July 17, 1980 in Moscow, written in the French form Delaunay ) was a Soviet mathematician. He worked in the fields of modern algebra, the geometry of numbers and mathematical crystallography.

Delone came from his father's side the French nobility Delaunay. Among his ancestors also scored Bernard -René Jordan de Launay, the last commander of the Bastille. Delone studied from 1909 to 1913 at the University of Kiev, where he earned his doctorate under Dmitry Grawe. From 1916 he was a lecturer at the Polytechnic Institute in Kiev and in 1922 professor in Leningrad. In 1928, he stayed on at the universities of Berlin and Hamburg. From 1935 he was a professor in Moscow, where he was from 1932 at the Steklov Institute of Mathematics. There he completed his habilitation 1934. From 1929 he was a corresponding member of the Soviet Academy of Sciences.

The Delaunay triangulation was introduced by him in 1934 and received his honor his name. Around 1935 he took about the same time the German mathematician Heinrich Heesch a way to specify the set of all fundamental flooring. Delone also dealt with the classification of space groups (especially Bravais lattice ). He also dealt with the geometry of numbers, with Lobatschewski'scher geometry ( non-Euclidian geometry), the theory of cubic binary forms, irrational numbers, additive number theory and geometric theory of algebraic equations and Galois theory. In 1948 he wrote a book on the development of mathematics in Russia.

Among the prominent students of Delone there were Alexander Alexandrov (with whom he 1934 a book on mathematical methods of crystal structure analysis wrote ), Dmitry and Igor Shafarevich Faddejew.

He was a member of the Leopoldina since 1962.

Writings (selection )

• " For the determination of algebraic number fields by congruences; an application to the Abelian equations. ", 1923, Journal of Pure and Applied Mathematics, 152 volume, pp. 120-124
• Complete solution of indeterminate equation X3q Y3 = 1 in integers, 1928, Mathematical Journal, 28 volume, pp. 1-9
• With D.K. Faddeev: The theory of the irrationalities of the third degree. ( Translations of mathematical monographs v. 10) Amer. Math Soc. 1964
• Newer representation of geometric crystallography, Z. f Crystallography, Volume 84, pp. 109-149, 1933