Heinrich Liebmann ( him. Karl Otto Heinrich Liebmann ; October 22, 1874 , Strasbourg - June 12, 1939 , Munich ) - German mathematician , expert in differential and non-Euclidean geometry .
Content
Biography
Heinrich Liebman was the son of Otto Liebman, a professor of philosophy (1840–1912), who worked at Jena.
From 1892 to 1897 he studied at the universities of Leipzig, Jena and Göttingen.
In 1895 he received his doctorate at the University of Jena.
The supervisor was Toma .
In 1897, he became an assistant at the University of Gottingen, and in 1898 - at the University of Leipzig, where he was habilitated in 1899.
In 1905 he became an adjunct professor at the University of Leipzig.
In 1910 he became an adjunct professor at the Technical University of Munich, and in 1915 he became a professor there.
In 1920, Liebmann succeeded Stackel As a professor at Heidelberg University, where he was rector in 1926 and dean of the Faculty of Mathematics and Natural Sciences in 1923/1924 and 1928/1929.
In 1935, he was subjected to political pressure from the Nazis, who forced him to retire (Libman was a Protestant, but had Jewish ancestors).
At his faculty, he and his colleague Rosenthal Were boycotted.
The last years of Liebman were held in Munich.
He was married twice and had four children.
Scientific Activities
The main works of Liebman relate to differential and non-Euclidean geometry. For example, in Lobachevsky’s geometry, he proposed a method for constructing a triangle in its three corners using a compass and a ruler. In differential geometry, he proved that a convex closed analytic surface is inflexible (this constituted a habital work), proved that a sphere is the only compact connected surface of constant Gaussian curvature in three-dimensional Euclidean space [2] and proved that if an arbitrarily small hole is cut on a sphere then the rest will be flexible [3] . He translated the works of Lobachevsky into German [4] . He was a member of the Saxon, Bavarian and Heidelberg Academies of Sciences.
Literature in Russian
- Kolmogorov A.N., Yushkevich A.P. (ed.) Mathematics of the XIX Century. M .: Science, volume 2. Geometry. Theory of Analytic Functions. (inaccessible link) 1981.
Notes
- ↑ Professorenkatalog der Universität Leipzig - Die Professoren-Datenbank für Leipzig . research.uni-leipzig.de. The appeal date is February 21, 2019.
- ↑ H. Liebmann, Eine neue Eigenschaft der Kugel , Gött. Nachr., 44-55 (1899).
- ↑ H. Liebmann, Die Verbiegung von geschlossenen und offenen Flächen positiver Krümmung , Münch. Ber., 267-291 (1919).
- ↑ NJ Lobatschefskij, Pangeometrie. (Kasan 1856.) Übersetzt und herausgegeben von H. Liebmann. Leipzig: Engelmann. (Ostwalds Klassiker 130) (1902).