Linda Jo Goldway Keen (born 9 August 1940 in New York City, New York) is a mathematician and Professor of Mathematics and Computer science at Lehman College and the Graduate Center of City University of New York where she has worked since 1965.
As a high school student she attended the Bronx High School of Science. She received her Bachelor of Science degree from the City College of New York, then studied at the Courant Institute of Mathematical Sciences, earning her Doctor of Philosophy in mathematics in 1964. She wrote her thesis on Riemann surfaces under the direction of Lipman Bers at NYU.
Keen has worked at the Institute for Advanced Study, Hunter College, University of California at Berkeley, Columbia University, Boston University, Princeton University, and the Massachusetts Institute of Technology, as well as at various mathematical institutes in Europe and South America. After her initial appointment in 1965, in 1974 Keen was promoted to Full Professor at Lehman College and the CUNY Graduate Center. She is currently Executive Officer of the Mathematics Program at the Graduate Center.
Keen served as president of the Association for Women in Mathematics during 1985-1986 and as vice-president of the American Mathematical Society during 1992-1995. She served on the Board of Trustees of the American Mathematical Society from 1999-2009 and as Associate Treasurer from 2009-2011. In 1975, she presented an AMS invited address and in 1989 she presented an MAA joint invited address. In 1993 she was selected as a Noether Lecturer.
Keen worked with the mathematicians Paul Blanchard, Robert Devaney, Jane Gilman, Lisa Goldberg, Nikola Lakic and Caroline Series among many others.
In addition to studying Riemann surfaces, Keen has worked in hyperbolic geometry, Kleinian groups and Fuchsian groups, complex analysis, and hyperbolic dynamics. In the field of hyperbolic geometry, she is known for the Collar lemma.
She is married to Jonathan Brezin and resides in New York.
Awards and honors
She has been honored with: AAUW Postdoctoral Fellowship Award, 1964–65 National Science Foundation Postdoctoral Fellow, 1964–65 Edwin S. Webster-Abby Rockefeller Mauze Award, M.I.T. 1990 Finish Mathematical Society Invited Foreign Speaker, JAN 1991 AWM Emmy Noether Lecturer, 1993 Joint Irish and London Mathematical Societies Invited Speaker, 1998 Lehman College Foundation Faculty Award, 1998 MAA Invited hour Address, Boulder CO, 1989 Swedish Royal Academy of Sciences Kovalevsky Days Programme Main Speaker, 2006
- Complex Dynamics with Robert I. Devaney
- Hyperbolic Geometry from a Local Viewpoint with Nikola Lakic
- The Legacy of Sonya Kovalevskaya}; Proceedings of a Symposium held at Radcliffe College and 3 AMS special sessions. Ed. L. Keen, Contemp. Math. 64, AMS 1987.
- Lipa's Legacy, Proceedings of the Bers Colloquium}, Ed. J. Dodziuk, L. Keen, Contemp. Math. 211, AMS 1997
- Complex Dynamics: 25 years after the appearance of the Mandelbrot set, Eds. R. Devaney, L. Keen, Contemp.
Math., 396, Amer. Math. Soc., Providence, RI, 2006.
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