Roger Temam
Roger Meyer Temam is a French applied mathematician working in several areas of applied mathematics including numerical analysis, nonlinear partial differential equations and fluid mechanics. He graduated from the University of Paris – the Sorbonne in 1967, completing a higher doctorate prepared under the direction of Jacques-Louis Lions. He published over 400 articles which appeared in major scientific journals, as well as 12 books some of which have been translated in different languages, including English, Russian, and Chinese. Three of his books are now published in permanent series.
Scientific work
The scientific work of Roger Temam, which is at the interface between mathematical analysis, numerical analysis and scientific computing, includes mathematical modeling and analysis, as well as the development of novel numerical methods. The first work of Roger Temam in his thesis dealt with the fractional steps method. Thereafter, he has continually explored and developed new directions and techniques:- calculus of variations, and, more precisely, the notion of duality, developing the mathematical framework for discontinuous solutions; a concept later used for his works on the mathematical theory of plasticity;
- mathematical formulation of the equilibrium of a plasma in a cavity, expressed as a nonlinear free boundary problem;
- Korteweg–de Vries equation;
- Kuramoto–Sivashinsky equation;
- Euler equations in a bounded domain;
- infinite-dimensional dynamical systems theory. In particular, he studied the existence of the finite-dimensional global attractor for many dissipative equations of mathematical physics, including the incompressible Navier–Stokes equations, for which he obtained, with Peter Constantin, Ciprian Foias and Oscar Manley, a physically relevant almost sharp upper bound on the dimension of the global attractor. He was also the co-founder of the notion of inertial manifolds together with Ciprian Foias and George R. Sell and of exponential attractors together with Alp Eden, Ciprian Foias and Basil Nicolaenko;
- optimal control of the incompressible Navier–Stokes equations as a tool for the control of turbulence;
- boundary layer phenomena for incompressible flows.
″The influence of Roger Temam in the development of applied mathematics in France, as well as all over the world, has been substantial.″ His scientific influence can also be measured in the number of doctoral theses that he has supervised, both in France and in the United States. According to the Mathematical Genealogy Project database, he holds the first position in the top 50 advisors. More than 30 of his students are now full professors all over the world, and have themselves many descendants.
Administrative activities
Besides his scientific work, Roger Temam has engaged in various administrative activities. He became a professor at the Paris-Sud University at Orsay in 1968. There, he co-founded the Laboratory of Numerical and Functional Analysis which he directed from 1972 to 1988. He was also a Maître de Conférences at the Ecole Polytechnique in Paris from 1968 to 1986.In 1983, Roger Temam co-founded the French Société de Mathématiques Appliquées et Industrielles, analogous to the Society for Industrial and Applied Mathematics, and served as its first president. He was also one of the founders of the International Congress on Industrial and Applied Mathematics series and was the chair of the steering committee of the first ICIAM meeting held in Paris in 1987; and the chair of the standing committee of the second ICIAM meeting held in Washington, D.C., in 1991. He was also the Editor-in-Chief of the mathematical journal M2AN from 1986 to 1997, and has served or is serving on the editorial board of such journals as Asymptotic Analysis, Discrete and Continuous Dynamical Systems, Journal of Differential Equations, Physica D, Communications in Partial Differential Equations and SIAM Journal on Numerical Analysis.
″Roger Temam also has a very successful career in the United States.″ He has been the Director of the Institute for Scientific Computing & Applied Mathematics at Indiana University since 1986. He is also a College Professor and he has been a Distinguished Professor since 2014.
Books
- 1. : Singular perturbations and boundary layers, Springer–Verlag, New-York, 2018.
- 2. : Mathematical Modelling in Continuum Mechanics, Cambridge University Press, 2001. French Translation, Springer–Verlag France, 2002. Chinese Translation, Tsinghua University Press, 2004. 2nd English Edition 2005. Russian translation, Moskva Linom, 2013.
- 3. : Dynamic, multilevel methods and the numerical simulation of turbulence; Cambridge University Press, 1999.
- 4. Infinite Dimensional Dynamical Systems in Mechanics and Physics, Springer–Verlag, New-York, Applied Mathematical Sciences Series, vol. 68, 1988. 2nd augmented edition, 1997. Reprinted in China by Beijing World Publishing Corp., 2000.
- 5. Mathematical Problems in Plasticity, Gauthier–Villars, Paris, 1983. English Transl., Gauthier–Villars, New-York, 1985. Russian Transl., Nauk, Moscow, 1991. ″Republished by Dover books in Physics, 2018.″
- 6. Navier-Stokes Equations, North–Holland Pub. Company, in English, 1977, 500 pages. Revised editions 1979, 1984 and 1985. Russian Translation, Mir, Moscow, 1981. ″Republished in the AMS–Chelsea Series, AMS, Providence, 2001.″
- 7. : Convex Analysis and Variational Problems. Dunod, Paris, 1974, 350 pages. English Translation, North–Holland, Amsterdam, 1976. Russian Translation, Mir, Moscow, 1979. ″English version republished in the Series ′Classics in Applied Mathematics′, SIAM, Philadelphia, 1999.″
Awards and honors
- Senior Prize of the International Society for the Interaction of Mechanics and Mathematics, Rome, 2016.
- Fellow of the American Academy of Arts and Sciences, of the American Mathematical Society, of the American Association for the Advancement of Science, of the Society for Industrial and Applied Mathematics.
- Knight of the Legion of Honor, France, 2012.
- Member of the French Academy of Sciences since 2007.
- Awards of the French Academy of Sciences: :fr:Prix Jacques-Louis-Lions|Prix Jacques-Louis-Lions, 2003; Grand Prix Alexandre Joannidès, 1993; Prix Carrière 1977.
- Seymour Cray Prize in Numerical Simulation, 1989.
- Award of the Collège de France, Prix Peccot, 1970.
- In China, Roger Temam has been awarded an Honorary Professorship from Fudan University, Xi’an Jiaotong University, and Lanzhou University.