Ursula Hamenstädt

Ursula Hamenstädt (born 15 January 1961) is a German mathematician who works as a professor at the University of Bonn.^[1] Her primary research subject is differential geometry.

Hamenstädt earned her PhD from the University of Bonn in 1986, under the supervision of Wilhelm Klingenberg. Her dissertation, Zur Theorie der Carnot-Caratheodory Metriken und ihren Anwendungen [The theory of Carnot–Caratheodory metrics and their applications], concerned the theory of sub-Riemannian manifolds.^[2]

After completing her doctorate, she became a Miller Research Fellow at the University of California, Berkeley and then an assistant professor at the California Institute of Technology before returning to Bonn as a faculty member in 1990.^[1]

Hamenstädt was an invited speaker at the International Congress of Mathematicians in 2010.^[3] In 2012 she was elected to the German Academy of Sciences Leopoldina,^[4] and in the same year she became one of the inaugural fellows of the American Mathematical Society.^[5] She was the Emmy Noether Lecturer of the German Mathematical Society in 2017.^[6]

• Hamenstädt, Ursula (2008). "Geometry of the mapping class groups I: Boundary amenability". Inventiones Mathematicae. 175 (3): 545–609. arXiv:math/0510116. Bibcode:2009InMat.175..545H. doi:10.1007/s00222-008-0158-2. ISSN 0020-9910. S2CID 2640202.
• Hamenstädt, Ursula (1989). "A new description of the Bowen–Margulis measure". Ergodic Theory and Dynamical Systems. 9 (3): 455–464. doi:10.1017/S0143385700005095. ISSN 1469-4417.
• Hamenstädt, Ursula (1990). "Some regularity theorems for Carnot–Carathéodory metrics". Journal of Differential Geometry. 32 (3): 819–850. doi:10.4310/jdg/1214445536. ISSN 0022-040X.

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