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{{short description|American physicist}} |
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[[File:James A. Isenberg.jpg|thumb|220px|James A. Isenberg]] |
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{{Infobox academic|image=James A. Isenberg.jpg|honorific_suffix=Professor Emeritus|education=1973 A.B. in physics, Princeton University<br/>1979 Ph.D. in physics, University of Maryland|occupation=Mathematician<br>Physicist|awards=American Physical Society Fellow<br>American Mathematical Society Fellow|thesis_title=Construction of Spacetimes from Initial Data|thesis_year=1979|doctoral_advisor=[[Charles Misner]]|thesis_url=https://www.proquest.com/openview/0bd67b921fa343948a0870095ae5bb5e/1?pq-origsite=gscholar&cbl=18750&diss=y|titles=Professor of Mathematics}} |
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'''James Isenberg''' is an American physicist. He is one of the pioneers in the study of the constraint equations in classical [[general relativity]]. His many important contributions include the completion of the solution theory of the constraint equations on closed manifolds with constant mean curvature, and with his collaborators, the first nontrivial results on the non-constant mean curvature case. He was a graduate student under [[Charles Misner]] at the [[University of Maryland, College Park|University of Maryland]] in the seventies. He is a professor of mathematics and physics at The [[University of Oregon]]. |
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'''James A. Isenberg''' (born 1951) is an American [[List of theoretical physicists|theoretical physicist]] and [[mathematician]], professor emeritus at the [[University of Oregon]]. |
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== Personal life and education == |
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Isenberg was born in 1951. He became an Eagle Scout in 1966,<ref>{{Cite news|date=1966-02-09|title=3 Scouts to Get Eagle Awards at Jewish Center Program|pages=5|work=Wilkes-Barre Times Leader, The Evening News|url=https://www.newspapers.com/clip/91745887/3-scouts-to-get-eagle-awards-at-jewish/|access-date=2022-01-03}}</ref> and in 1969 graduated from [[Plymouth-Whitemarsh High School]] in [[Plymouth Meeting, Pennsylvania]].<ref name=":2">{{cite web |date=2021|title=James A. Isenberg Curriculum Vitae|url=https://pages.uoregon.edu/isenberg/CV.pdf|access-date=January 3, 2022|website=uoregon.edu}}</ref> |
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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."<ref name=":0">{{Cite news|date=1969-05-01|title=26-Mile Runner, 18, Had to Prove His Age|pages=81|work=The Philadelphia Inquirer|url=https://www.newspapers.com/clip/91746020/26-mile-runner-18-had-to-prove-his-age/|access-date=2022-01-03}}</ref><ref>{{Cite news|date=1969-05-01|title=Runner Wears Birth Certificate|pages=83|work=The Philadelphia Inquirer|url=https://www.newspapers.com/clip/91745993/runner-wears-birth-certificate/|access-date=2022-01-03}}</ref> He wore his birth certificate pinned to his jersey to prove his age.<ref name=":0" /> Isenberg says he has "completed 143 marathons, including 30 Boston Marathons."<ref name=":1">{{cite web |title=Jim Isenberg's story|url=https://mageerehab.jeffersonhealth.org/patient-story/james-isenbergs-story/|access-date=2022-01-03|website=Magee Rehabilitation}}</ref> |
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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, College Park|University of Maryland]], and he earned Ph.D. in physics in 1979, with his dissertation, ''Construction of Spacetimes from Initial Data''.<ref>{{mathgenealogy|id=12931}}</ref> |
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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]].<ref name=":1" /> In 2019 at the Princeton alumni parade, he "led his class down the route in a wheelchair".<ref>{{cite web |date=2019-07-03|title=Reunited!|url=https://paw.princeton.edu/article/reunited|access-date=2022-01-03|website=Princeton Alumni Weekly|language=en}}</ref> |
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Isenberg lives in Philadelphia, Pennsylvania, with his wife, economist Pauline Kennedy.<ref name=":1" /> |
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== Career == |
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Isenberg is one of the pioneers in the study of the constraint equations in classical [[general relativity]].<ref>{{Cite journal|last=Isenberg|first=James|date=1995|title=Constant mean curvature solutions of the Einstein constraint equations on closed manifolds|url=https://doi.org/10.1088/0264-9381/12/9/013|journal=Classical and Quantum Gravity|language=en|volume=12|issue=9|pages=2249–2274|doi=10.1088/0264-9381/12/9/013|bibcode=1995CQGra..12.2249I |issn=0264-9381}}</ref> His many important contributions include the completion of the solution theory of the [[Constraint (mathematics)|constraint equations]] on [[closed manifold]]s with constant [[mean curvature]],<ref>{{Cite journal|last=Isenberg|first=James|date=1995|title=Constant mean curvature solutions of the Einstein constraint equations on closed manifolds|journal=Classical and Quantum Gravity|language=en|volume=12|issue=9|pages=2249–2274|doi=10.1088/0264-9381/12/9/013|bibcode=1995CQGra..12.2249I |issn=0264-9381}}</ref> and with his collaborators, the first nontrivial results on the non-constant mean curvature case.<ref>{{Citation|last1=Isenberg|first1=James|date=1994|work=Physics on Manifolds: Proceedings of the International Colloquium in honour of Yvonne Choquet-Bruhat, Paris, June 3–5, 1992|pages=295–302|editor-last=Flato|editor-first=M.|series=Mathematical Physics Studies|place=Dordrecht|publisher=Springer Netherlands|language=en|doi=10.1007/978-94-011-1938-2_21|isbn=978-94-011-1938-2|last2=Moncrief|first2=Vincent|title=Some Results on non Constant Mean Curvature Solutions of the Einstein Constraint Equations |editor2-last=Kerner|editor2-first=R.|editor3-last=Lichnerowicz|editor3-first=A.}}</ref> |
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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]].<ref name=":2" /> |
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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]].<ref>{{cite web |title=Jim Isenberg named American Mathematical Society fellow {{!}} Institute for Fundamental Science|url=https://ifs.uoregon.edu/2021/01/20/jim-isenberg-named-american-mathematical-society-fellow/|access-date=2022-01-03|website=ifs.uoregon.edu}}</ref> |
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==Recognition== |
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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."<ref>{{cite web |title=APS Fellow Archive|url=http://www.aps.org/programs/honors/fellowships/archive-all.cfm|access-date=2022-01-03|website=www.aps.org|language=en}}</ref> |
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He was named to the 2021 class of fellows of the [[American Mathematical Society]] "for contributions to mathematical general relativity and geometry flows".<ref>{{citation|url=https://www.ams.org/cgi-bin/fellows/fellows_by_year.cgi?year=2021|title=2021 Class of Fellows of the AMS|publisher=American Mathematical Society|access-date=2020-11-02}}</ref> |
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The [[Pacific Coast Gravity Meeting]] has been dedicated to Isenberg as of the 34th meeting at [[California Institute of Technology|Caltech]] in 2018.<ref>{{citation|url=http://www.tapir.caltech.edu/~pcgm34/|title=34th Pacific Coast Gravity Meeting|access-date=2023-12-13}}</ref> The conference is now known as the Jim Isenberg Pacific Coast Gravity Meeting.<ref>{{citation|url=https://utahstatephysics.wixsite.com/35jimisenbergpcgm|title=35th Jim Isenberg Pacific Coast Gravity Meeting|access-date=2023-12-13}}</ref><ref>{{citation|url=https://sgralla.arizona.edu/pcgm37/index.html|title=37th Jim Isenberg Pacific Coast Gravity Meeting|access-date=2023-12-13}}</ref><ref>{{citation|url=https://qmap.ucdavis.edu/events/events-past-events/pcgm-2022|title=Jim Isenberg Pacific Coast Gravity Meeting 2022|access-date=2023-12-13}}</ref> |
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==Selected works== |
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*[https://www.ams.org/bookstore-getitem/item=surv-206''The Ricci Flow: Techniques and Applications: Part IV: Long-Time Solutions and Related Topics''], American Math Society, (2015) |
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* {{cite journal | author=Isenberg, J. | title=Constant mean curvature solution of the Einstein constraint equations on closed manifold | journal=Class. Quantum Grav. | year=1995 | volume=12 | pages=2249–2274 | doi=10.1088/0264-9381/12/9/013|bibcode = 1995CQGra..12.2249I | issue=9 }} |
* {{cite journal | author=Isenberg, J. | title=Constant mean curvature solution of the Einstein constraint equations on closed manifold | journal=Class. Quantum Grav. | year=1995 | volume=12 | pages=2249–2274 | doi=10.1088/0264-9381/12/9/013|bibcode = 1995CQGra..12.2249I | issue=9 }} |
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{{Persondata <!-- Metadata: see [[Wikipedia:Persondata]]. --> |
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{{reflist}} |
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| NAME = Isenberg, James A. |
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| ALTERNATIVE NAMES = |
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== External links == |
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| SHORT DESCRIPTION = American physicist |
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| DATE OF BIRTH = |
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* {{YouTube|id=6m53k7hZJTU|title=Jim Isenberg - The Conformal Method and Solutions of the Einstein Constraint Equation}} (video, 1:01:12 hours) |
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| PLACE OF BIRTH = |
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* {{YouTube|id=hdO9T8A9js4|title=Symmetries of Cosmological Cauchy Horizons with Non-Closed Orbits - Jim Isenberg}} (video, 38:43 minutes) |
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| DATE OF DEATH = |
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* {{YouTube|id=hwOCqA9Xw6A|title=Ricci Flow - Numberphile}} (video, 14:40 minutes) |
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| PLACE OF DEATH = |
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* {{YouTube|id=Some Recent Results on Ricci Flow - Jim Isenberg|title=Some Recent Results on Ricci Flow - Jim Isenberg}} (video, 1:00:00 hour) |
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}} |
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{{authority control}} |
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{{DEFAULTSORT:Isenberg, James A.}} |
{{DEFAULTSORT:Isenberg, James A.}} |
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[[Category:American physicists]] |
[[Category:21st-century American physicists]] |
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[[Category:American relativity theorists]] |
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[[Category:University of Maryland, College Park alumni]] |
[[Category:University of Maryland, College Park alumni]] |
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[[Category:University of Oregon faculty]] |
[[Category:University of Oregon faculty]] |
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[[Category:Living people]] |
[[Category:Living people]] |
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[[Category:Fellows of the American Mathematical Society]] |
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[[Category:1951 births]] |
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{{US-physicist-stub}} |
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[[Category:Fellows of the American Physical Society]] |
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Latest revision as of 07:23, 14 December 2023
James A. Isenberg Professor Emeritus | |
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| 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)
