Victor Bangert (born 28 November 1950) is Professor of

Mathematics Mathematics is a field of study that discovers and organizes methods, Mathematical theory, theories and theorems that are developed and Mathematical proof, proved for the needs of empirical sciences and mathematics itself. There are many ar ...

at the Mathematisches Institut in

Freiburg Freiburg im Breisgau or simply Freiburg is the List of cities in Baden-Württemberg by population, fourth-largest city of the German state of Baden-Württemberg after Stuttgart, Mannheim and Karlsruhe. Its built-up area has a population of abou ...

Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...

. His main interests are

differential geometry Differential geometry is a Mathematics, mathematical discipline that studies the geometry of smooth shapes and smooth spaces, otherwise known as smooth manifolds. It uses the techniques of Calculus, single variable calculus, vector calculus, lin ...

and

dynamical systems theory Dynamical systems theory is an area of mathematics used to describe the behavior of complex systems, complex dynamical systems, usually by employing differential equations by nature of the ergodic theory, ergodicity of dynamic systems. When differ ...

. He specialises in the theory of

closed geodesic In differential geometry and dynamical systems, a closed geodesic on a Riemannian manifold is a geodesic that returns to its starting point with the same tangent direction. It may be formalized as the projection of a closed orbit of the geodesic f ...

s, wherein one of his significant results, combined with another one due t
John Franks
implies that every Riemannian 2-sphere possesses infinitely many closed geodesics. He also made important contributions to Aubry–Mather theory. He obtained his Ph.D. from

Universität Dortmund TU Dortmund University () is a technical university in Dortmund, North Rhine-Westphalia, Germany with over 35,000 students, and over 6,000 staff including 300 professors, offering around 80 Bachelor's and master's degree programs. It is situate ...

in 1977 under the supervision of Rolf Wilhelm Walter, with the thesis ''Konvexität in riemannschen Mannigfaltigkeiten''. He served in the editorial board of
manuscripta mathematica
from 1996 to 2017. Bangert was an invited speaker at the 1994 International Congress of Mathematicians in

Zürich Zurich (; ) is the list of cities in Switzerland, largest city in Switzerland and the capital of the canton of Zurich. It is in north-central Switzerland, at the northwestern tip of Lake Zurich. , the municipality had 448,664 inhabitants. The ...

Selected publications

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References

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External links

Personal webpageOberwolfach photos of Victor Bangert
20th-century German mathematicians 21st-century German mathematicians 1950 births Living people German geometers Dynamical systems theorists German systems scientists Scientists from Osnabrück {{germany-mathematician-stub