Joseph Liberman (1917 in
Henichesk – August 1941 in ) was a Soviet mathematician, a student of
Aleksandrov, best known for
Liberman's lemma
Liberman's lemma is a theorem used in studying intrinsic metric, intrinsic geometry of convex surface.
It is named after Joseph Liberman.
Formulation
If \gamma is a unit-speed minimizing geodesic on the surface of a convex body ''K'' in Euclidean ...
.
Biography
In 1936 he entered
Leningrad State University as one of the winners of the first city Mathematical Olimpiad.
He worked in geometry and real analysis. In 1938 he published his first paper. In 1939 he entered graduate school.
He served in the army since June 1941. He defended Ph.D. thesis in June 1941. At this time he was already lieutenant of Navy anti-aircraft warfare.
In August 1941 he was sent to
Tallinn
Tallinn is the capital city, capital and List of cities in Estonia, most populous city of Estonia. Situated on a Tallinn Bay, bay in north Estonia, on the shore of the Gulf of Finland of the Baltic Sea, it has a population of (as of 2025) and ...
,
Estonia
Estonia, officially the Republic of Estonia, is a country in Northern Europe. It is bordered to the north by the Gulf of Finland across from Finland, to the west by the Baltic Sea across from Sweden, to the south by Latvia, and to the east by Ru ...
where he died.
Three geometric papers of Liberman appeared in 1941 and another in 1943.
See also
*
Liberman's lemma
Liberman's lemma is a theorem used in studying intrinsic metric, intrinsic geometry of convex surface.
It is named after Joseph Liberman.
Formulation
If \gamma is a unit-speed minimizing geodesic on the surface of a convex body ''K'' in Euclidean ...
References
* ''Александров А. Д.'' Настоящие люди. Иосиф Либерман и Сергей Оловянишников /
Статьи разных лет — Новосибирск: Наука, 2008. — 804 с. — (Избранные труды; Т. 3). — С. 675—677.
** … // Проблемы науки и позиция ученого. — Л.: Наука, 1988. — С. 469—471.
* ''Александров А. Д.'
// Квант, 1982, № 11.
* ''Залгаллер В. А.'
Погибали лучшие// Санкт-Петербургский университет, № 1 (3690), 25 января 2005.
Liberman, Iosif Meerovich (1917–1941)
{{DEFAULTSORT:Liberman, Joseph
1917 births
1941 deaths
Soviet mathematicians
Differential geometers
Saint Petersburg State University alumni
Soviet military personnel killed in World War II