Tudor Ratiu Explained

Tudor Stefan Rațiu (born March 18, 1950) is a Romanian-American mathematician who has made contributions to geometric mechanics and dynamical systems theory.

Education

Rațiu was born in Timișoara.^[1] His father, Mircea Ratiu, an engineer, was the younger brother of Ion Rațiu, a well-known Romanian politician, while his mother, Rodica Bucur, was a piano professor at the Conservatory of Music in Timișoara.^{[2] [3]} Ratiu did his undergraduate studies at the Politehnica University of Timișoara, completing his B.Sc. in 1973 and his M.S. in 1974.^{[1] [4]}

After moving to the United States, he completed his Ph.D. degree at the University of California, Berkeley in 1980; his dissertation, written under the supervision of Jerrold E. Marsden, was titled Euler-Poisson Equations on Lie Algebras.

Career

From 1980 to 1983 Ratiu was a T. H. Hildebrandt Research Assistant Professor at the University of Michigan, after which he became an Associate Professor of Mathematics at the University of Arizona. In 1987 he moved to the University of California, Santa Cruz, where he became a Professor of Mathematics in 1988.^[5]

In 1998 Ratiu moved to the École Polytechnique Fédérale de Lausanne, where he was a professor until 2015.^[4] In 2014–15, he was a Professor of Mathematics at the Skolkovo Institute of Science and Technology in Russia. Since 2016 he is a professor at Shanghai Jiao Tong University in China.^[6]

Ratiu received a Sloan Research Fellowship in 1980,^[4] and he became a fellow of the American Mathematical Society in 2012.^[7]

Publications

• Book: Ralph . Abraham . Ralph Abraham (mathematician) . Jerrold E. . Marsden . Jerrold E. Marsden . Tudor . Ratiu . Manifolds, Tensor Analysis, and Applications . New York. . 1988 . Applied Mathematical Sciences. 75 . 10.1007/978-1-4612-1029-0. 978-0-387-96790-5. 0960687 .
• Gay-Balmaz. François. Ratiu. Tudor. Tudor Ratiu. Tronci. Cesare. Equivalent theories of liquid crystal dynamics. . 210. 2013. 3. 773–811. 10.1007/s00205-013-0673-1. 1102.2918. 2013ArRMA.210..773G. 3116004. 14968950.
• Holm. Darryl D.. Jerrold E. . Marsden . Jerrold E. Marsden . Tudor . Ratiu . The Euler-Poincaré equations and semidirect products with applications to continuum theories. Advances in Mathematics. 137. 1998. 1. 1–81. 1627802. 10.1006/aima.1998.1721. chao-dyn/9801015. 163598.
• Book: Jerrold E. . Marsden . Jerrold E. Marsden . Tudor . Ratiu . Introduction to mechanics and symmetry. A basic exposition of classical mechanical systems. Second . Texts in Applied Mathematics. 17. Springer-Verlag. New York. 1999. 0-387-98643-X . 1723696 . 10.1007/978-0-387-21792-5.
• Book: Juan-Pablo . Ortega . Tudor . Ratiu . Momentum maps and Hamiltonian reduction. Progress in Mathematics. 222. . Boston, MA. 2004. 0-8176-4307-9 . 2021152. 10.1007/978-1-4757-3811-7.

Notes and References

1. Web site: Conferinta: Dr. Tudor RATIU - 12 ianuarie 2017 . Conference: Dr. Tudor RATIU - 12 January 2017 . Facultatea de Matematică şi Informatică . 25 May 2024 . https://web.archive.org/web/20180319004133/http://lascog11.info.uvt.ro/fmi/evenimente/conferinta-dr-tudor-ratiu-12-ianuarie-2016 . 19 March 2018 . Romanian . 12 January 2017.
2. Web site: Obituary of Ion Raţiu's brother. 2018-03-18. https://web.archive.org/web/20180319084745/http://m.jurnalul.ro/stiri/observator/a-murit-fratele-lui-ion-ratiu-589177.html. 2018-03-19. dead.
3. Web site: Genealogy of Rațiu Family. ratiu.org. 2018-03-19.
4. Web site: CV from 2016. March 18, 2018.
5. Web site: CV at UC Santa Cruz.
6. Web site: Tudor Stefan Ratiu. Shanghai Jiao Tong University. February 9, 2020.
7. Web site: List of Fellows of the American Mathematical Society. 2018-03-18.