Lazar Lyusternik

Lasar Aronowitsch Ljusternik (Russian Лазарь Аронович Люстерник; * 19 Dezemberjul / December 31 1899greg Zdunska Wola, .. † 23 July 1981 in Moscow) was a Russian mathematician who worked on topology, differential geometry and geometry.

Ljusternik 1926 at the Lomonosov University in Moscow with Nikolai Lusin doctoral thesis on direct methods in the calculus of variations.

Ljusternik approached with Lev Schnirelmann late 1920s variational methods in differential geometry and topology, which they solved an open problem by Henri Poincaré geodesics on closed surfaces, among others. 1946 received Ljusternik for the Soviet State Prize. He also generalized Brunn - Minkowski 1935, the theorem and wrote several important works on functional analysis, which made him one of the founders of the Russian school in this area. After 1942 he was mainly concerned with the theory of algorithms and was head of one of the leading Soviet data centers.

His doctoral counts Vladimir Sobolev, with whom he wrote a textbook on functional analysis. He also wrote a textbook on topological methods in the calculus of variations and a popular book on simple variational problems.