Marina Ratner
Marina E. Ratner | |
|---|---|
Marina Ratner in 1988 | |
| Born | October 30, 1938 |
| Died | July 7, 2017 (aged 78) |
| Nationality | American |
| Alma mater | Moscow State University |
| Awards | Ostrowski Prize (1993) |
| Scientific career | |
| Fields | Mathematics |
| Institutions | University of California, Berkeley |
| Thesis | Geodesic Flows on Unit Tangent Bundles of Compact Surfaces of Negative Curvature (1969) |
| Doctoral advisor | Yakov Sinai |
Marina Evseevna Ratner (Russian: Мари́на Евсе́евна Ра́тнер; October 30, 1938 – July 7, 2017) was a professor of mathematics at the University of California, Berkeley who worked in ergodic theory. Around 1990, she proved a group of major theorems concerning unipotent flows on homogeneous spaces, known as Ratner's theorems. Ratner was elected to the American Academy of Arts and Sciences in 1992, awarded the Ostrowski Prize in 1993 and elected to the National Academy of Sciences the same year. In 1994, she was awarded the John J. Carty Award from the National Academy of Sciences.