James A. Isenberg
James A. Isenberg Professor Emeritus | |
|---|---|
 | |
| Occupation(s) | Mathematician Physicist |
| Title | Professor of Mathematics |
| Awards | American Physical Society Fellow American Mathematical Society Fellow |
| Academic background | |
| Education | 1973 A.B. in physics, Princeton University 1979 Ph.D. in physics, University of Maryland |
| Thesis | Construction of Spacetimes from Initial Data (1979) |
| Doctoral advisor | Charles Misner |
James A. Isenberg (born 1951) is an American theoretical physicist and mathematician, professor emeritus at the University of Oregon.
Personal life and education
[edit]Isenberg was born in 1951. He became an Eagle Scout in 1966,[1] and in 1969 graduated from Plymouth-Whitemarsh High School in Plymouth Meeting, Pennsylvania.[2]
When he ran the Boston Marathon at age 18, The Philadelphia Inquirer reported he "is 5 feet 1 inch tall, weighs 95 pounds and looks about 13."[3][4] He wore his birth certificate pinned to his jersey to prove his age.[3] Isenberg says he has "completed 143 marathons, including 30 Boston Marathons."[5]
At Princeton University he graduated with an A.B. in physics in 1973. He was a graduate student under Charles Misner at the University of Maryland, and he earned Ph.D. in physics in 1979, with his dissertation, Construction of Spacetimes from Initial Data.[6]
In Australia in 2017, Isenberg was standing in the ocean when a wave knocked him over, injuring his spinal cord and leaving him paralyzed from the neck down. He has been recovering with therapy at Magee Rehabilitation Hospital in Philadelphia.[5] In 2019 at the Princeton alumni parade, he "led his class down the route in a wheelchair".[7]
Isenberg lives in Philadelphia, Pennsylvania, with his wife, economist Pauline Kennedy.[5]
Career
[edit]Isenberg is one of the pioneers in the study of the constraint equations in classical general relativity.[8] His many important contributions include the completion of the solution theory of the constraint equations on closed manifolds with constant mean curvature,[9] and with his collaborators, the first nontrivial results on the non-constant mean curvature case.[10]
From 1973 to 1979, Isenberg held positions in the physics department at the University of Maryland. Between 1979 and 1982 he held a postdoctoral fellow positions in the applied mathematics department of the University of Waterloo and the mathematics department at the University of California, Berkeley.[2]
Isenberg joined the mathematics department faculty at the University of Oregon in 1982 and in 2021 became a professor emeritus of mathematics at the University of Oregon.[11]
Recognition
[edit]Isenberg was elected a Fellow of the American Physical Society in 2000, cite "For his pioneering work on global issues in general relativity and for his contributions to the field."[12]
He was named to the 2021 class of fellows of the American Mathematical Society "for contributions to mathematical general relativity and geometry flows".[13]
The Pacific Coast Gravity Meeting has been dedicated to Isenberg as of the 34th meeting at Caltech in 2018.[14] The conference is now known as the Jim Isenberg Pacific Coast Gravity Meeting.[15][16][17]
Selected works
[edit]- The Ricci Flow: Techniques and Applications: Part IV: Long-Time Solutions and Related Topics, American Math Society, (2015)
- Isenberg, J. (1995). "Constant mean curvature solution of the Einstein constraint equations on closed manifold". Class. Quantum Grav. 12 (9): 2249–2274. Bibcode:1995CQGra..12.2249I. doi:10.1088/0264-9381/12/9/013.
References
[edit]- ^ "3 Scouts to Get Eagle Awards at Jewish Center Program". Wilkes-Barre Times Leader, The Evening News. 1966-02-09. p. 5. Retrieved 2022-01-03.
- ^ a b "James A. Isenberg Curriculum Vitae" (PDF). uoregon.edu. 2021. Retrieved January 3, 2022.
- ^ a b "26-Mile Runner, 18, Had to Prove His Age". The Philadelphia Inquirer. 1969-05-01. p. 81. Retrieved 2022-01-03.
- ^ "Runner Wears Birth Certificate". The Philadelphia Inquirer. 1969-05-01. p. 83. Retrieved 2022-01-03.
- ^ a b c "Jim Isenberg's story". Magee Rehabilitation. Retrieved 2022-01-03.
- ^ James A. Isenberg at the Mathematics Genealogy Project
- ^ "Reunited!". Princeton Alumni Weekly. 2019-07-03. Retrieved 2022-01-03.
- ^ Isenberg, James (1995). "Constant mean curvature solutions of the Einstein constraint equations on closed manifolds". Classical and Quantum Gravity. 12 (9): 2249–2274. Bibcode:1995CQGra..12.2249I. doi:10.1088/0264-9381/12/9/013. ISSN 0264-9381.
- ^ Isenberg, James (1995). "Constant mean curvature solutions of the Einstein constraint equations on closed manifolds". Classical and Quantum Gravity. 12 (9): 2249–2274. Bibcode:1995CQGra..12.2249I. doi:10.1088/0264-9381/12/9/013. ISSN 0264-9381.
- ^ Isenberg, James; Moncrief, Vincent (1994), Flato, M.; Kerner, R.; Lichnerowicz, A. (eds.), "Some Results on non Constant Mean Curvature Solutions of the Einstein Constraint Equations", Physics on Manifolds: Proceedings of the International Colloquium in honour of Yvonne Choquet-Bruhat, Paris, June 3–5, 1992, Mathematical Physics Studies, Dordrecht: Springer Netherlands, pp. 295–302, doi:10.1007/978-94-011-1938-2_21, ISBN 978-94-011-1938-2
- ^ "Jim Isenberg named American Mathematical Society fellow | Institute for Fundamental Science". ifs.uoregon.edu. Retrieved 2022-01-03.
- ^ "APS Fellow Archive". www.aps.org. Retrieved 2022-01-03.
- ^ 2021 Class of Fellows of the AMS, American Mathematical Society, retrieved 2020-11-02
- ^ 34th Pacific Coast Gravity Meeting, retrieved 2023-12-13
- ^ 35th Jim Isenberg Pacific Coast Gravity Meeting, retrieved 2023-12-13
- ^ 37th Jim Isenberg Pacific Coast Gravity Meeting, retrieved 2023-12-13
- ^ Jim Isenberg Pacific Coast Gravity Meeting 2022, retrieved 2023-12-13
External links
[edit]- Jim Isenberg - The Conformal Method and Solutions of the Einstein Constraint Equation on YouTube (video, 1:01:12 hours)
- Symmetries of Cosmological Cauchy Horizons with Non-Closed Orbits - Jim Isenberg on YouTube (video, 38:43 minutes)
- Ricci Flow - Numberphile on YouTube (video, 14:40 minutes)
- Recent Results on Ricci Flow - Jim Isenberg Some Recent Results on Ricci Flow - Jim Isenberg on YouTube (video, 1:00:00 hour)
