CEREMADE
Ekeland Ivar
Professor emeritus
Biography
IVAR EKELAND
Fellow of the Royal Society of Canada
Member of the Academia Europea
Foreign member of the Academies ofNorway, Palestine and Austria
Honorary doctorates from the Universities ofBritish Columbia,Saint-Petersburg, and Vienna
Academic career
Service to the scientific community
Distinctions
Journal editorships
Thesis supervisions
1963-67
Student at Ecole Normale Supérieure
1967-1970
Research assistant at CNRS
1970-2003
Professor at the University of Paris-Dauphine
2003-2011
Canada Research Chair in Mathematical Economics, University of British Columbia
2008-present
Professor Emeritus at the University of Paris-Dauphine
SERVICE TO THE SCIENTIFIC COMMUNITY
1989-94
President of the University of Paris-Dauphine
1991-94
President of the Scientific Council of Ecole Normale Supérieure
1991-1994
President of the National Board for Professional Higher Education (IUP)
2001
Chair of the Review Panel for Mathematical Education in French-speaking Belgian universities
2003
Chair of the Review Panel for Mathematical Research in Norwegian universities
2003-2008
Director, the Pacific Institute of Mathematical Sciences (PIMS)
2007-2011
Co-Chair of the Scientific committee for the 2011 International Congress of Industrial and Applied Mathematics (ICIAM)
2008-2012
Member of the Forschungskuratorium of the Austrian Academy of Sciences
2009-2012
Président du Conseil Scientifique de la Fondation du Risque
2010-2016
Member of the Scienfic Advisory Board of the Toulouse School of Economics
2020- present
Member of the Comité Scientifique de l'Autorité des Marché Financiers
2020
Member of the Academia Europea
1978
Invited speaker at the International Congress of Mathematicians
1983
Paul Langevin prize of the Paris Academy of Sciences
1984
Jean Rostand prize for my book “Mathematics and the Unexpected”
1992
d'Alembert prize for my book “The broken dice“
1995
Honorary doctorate from the University of British Columbia (Canada)
1996
Honorary doctorate from the Saint-Peterburg University of Economics and Finance (Russia)
1996
Grand Prize of the Belgian Academy of Sciences
1998
Foreign member, the Norwegian Academy of Sciences
2001
Sara Lee Chair in Economics, University of Chicago
2007
Public lecture at the International Congress of Industrial and Applied Mathematics (ICIAM)
2008
Fellow of the Royal Society of Canada
2009
Foreign member, the Palestinian Academy for Science and Technology
2009
Honorary degree from l'Ecole Internationale des Sciences du Traitement de l'Information
2012
Foreign member, the Austrian Academy of Sciences
2012
Honorary doctorate from the University of Vienna
2020
Member of the Academia Europea
JOURNAL EDITORSHIPS
1984-1990
Founder and Editor-in-Chief, Annales de l'Institut Henri Poincaré, Seric C, Analyse Non Linéaire
2011- 2015
Editor-in-Chief, Mathematics and Financial Economics
There are two types of thesis in France : the first one is equivalent to a PhD, and qualifies its holder for an assisant professorship, the second one requires several more years of work, qualifies its defender for a professorship
PhD thesis (thèse de 3ème cycle ou thèse)
Lasry (1972), Berliocchi (1972), Quetin (1973), Momal (1974), Lebourg (1975), Henri (1978), Bougeard (1978), Orthmans (1979), Gaussens (1979), Azé (1980), Frenisy (1980), Blot (1981), Truc J.C. (1983), Truc M. (1983), Ollivry (1983), Albizatti (1983), Viterbo (1985), Brousseau (1985), Mathlouti (1986), Ranty (1987), Assem (1987), Saddek (1988), Daly (1989), Künzle (1990), Geoffard (1991), Ounaïes (1991), Romano (1992), Guérinet (1992), Daher (1993), Séré (1993), Bolle (1994), Burdeau (1994), Praud-Lion (1996), Aloqeili (2000), Carlier (2001), Dia (2003), Basta (2003), Moreno (2008)
Professorhip thesis (thèse d'état, ou habilitation à diriger des recherches)
Lasry (1975), Balasko (1977), Methlouti-Trad (1979), Gaussens (1984), Lassoued (1987), Blot (1992), Mathlouti (1993), Viterbo (1989), Séré (1994), Vieille (1998), Touzi (1999), Carlier (2003), Sant'Ambrogio (2010)
Publications
Articles
Ekeland I., Séré É. (2021), A surjection theorem for maps with singular perturbation and loss of derivatives, Journal of the European Mathematical Society, vol. 23, n°10, p. 323–3349 
Alasseur C., Ekeland I., Élie R., Hernández Santibáñez N., Possamaï D. (2020), An adverse selection approach to power pricing, SIAM Journal on Control and Optimization, vol. 58, n°2, p. 686-713
Ekeland I., Lautier D., Villeneuve B. (2019), Hedging pressure and speculation in commodity markets, Economic Theory, vol. 68, n°1, p. 83--123
Carluccio J., Ekeland I., Guesnerie R. (2017), Fragmentation and Wage Inequality: Insights from a Simple Model, Annals of Economics and Statistics, n°125-126, p. 113-134
Asheim G., Ekeland I. (2016), Resource conservation across generations in a Ramsey-Chichilnisky model, Economic Theory, vol. 61, n°4, p. 611-639
Ekeland I., Queyranne M. (2015), Optimal pits and optimal transportation, ESAIM: Mathematical Modelling and Numerical Analysis, vol. 49, n°6, p. 1659-1670
Schachermayer W., Ekeland I. (2014), Optimal transport and the geometry of L1(Rd), Proceedings of the American Mathematical Society, vol. 142, p. 3585-3596
Carlier G., Aloqeili M., Ekeland I. (2014), Restrictions and identification in a multidimensional risk-sharing problem, Economic Theory, vol. 56, n°2, p. 409-423
Ekeland I. (2014), How to Build Stable Relationships Between People Who Lie and Cheat, Milan Journal of Mathematics, vol. 82, n°1, p. 67-79
Ekeland I., Long Y., Zhou Q. (2013), A new class of problems in the calculus of variations, Regular and Chaotic Dynamics, vol. 18, n°6, p. 553-584
Galichon A., Ekeland I. (2013), The housing problem and revealed preference theory: duality and an application, Economic Theory, vol. 54, n°3, p. 425-441
Ekeland I., Galichon A., Henry M. (2012), Comonotonic Measures of Multivariate Risks, Mathematical Finance, vol. 22, n°1, p. 109-132
Pirvu T., Mbodji O., Ekeland I. (2012), Time-Consistent Portfolio Management, SIAM Journal on Financial Mathematics, vol. 3, n°1, p. 1-32
Ekeland I., Schachermayer W. (2011), Law invariant risk measures on L∞ (ℝd), Statistics & Risk Modeling, vol. 28, n°3, p. 195-225
Ekeland I., Galichon A., Henry M. (2010), Optimal transportation and the falsifiability of incompletely specified economic models, Economic Theory, vol. 42, n°2, p. 355 - 374
Carlier G., Ekeland I. (2010), Matching for Teams, Economic Theory, vol. 42, n°2, p. 397-418
Ekeland I., Carlier G. (2007), Equilibrium structure of a bidimensional asymmetric city, Nonlinear Analysis: Real World Applications, vol. 8, n°3, p. 725-748
Touzi N., Ekeland I., Carlier G. (2007), Optimal derivatives design for mean–variance agents under adverse selection, Mathematics and Financial Economics, vol. 1, n°1, p. 57-80
Taflin E., Ekeland I. (2005), A theory of bond portfolios, Annals of Applied Probability, vol. 15, n°2, p. 1260-1305
Bouchard B., Ekeland I., Touzi N. (2004), On the Malliavin approach to Monte Carlo approximation of conditional expectations, Finance and Stochastics, vol. 8, n°1, p. 45-71
Carlier G., Ekeland I. (2004), The Structure of Cities, Journal of Global Optimization, vol. 29, n°4, p. 371-376
Chiappori P-A., Ekeland I. (2004), Applying exterior differential calculus to economics: a presentation and some new results, Japan and the World Economy, vol. 16, n°3, p. 363-385
Nesheim L., Heckman J., Ekeland I. (2004), Identification and Estimation of Hedonic Models, The Journal of Political Economy, vol. 112, n°S1, p. S60-S109
Chiappori P-A., Ekeland I. (2004), Individual excess demands, Journal of Mathematical Economics, vol. 40, n°1-2, p. 41-57
Chiappori P-A., Ekeland I., Kubler F., Polemarchakis H. (2002), The Identification of Preferences from Equilibrium Prices under Uncertainty, Journal of Economic Theory, vol. 102, n°2, p. 403-420
Ekeland I., Nirenberg L. (2002), A Convex Darboux Theorem, Methods and Applications of Analysis, vol. 9, n°3, p. 329-344
Ekeland I. (2002), Equilibrium: In the balance, Nature, n°417, p. 385
Ekeland I. (2000), Curves and numbers, Nature, n°405, p. 748-749
Ekeland I. (2000), Testable consequences of economic theory, Decisions in Economics and Finance, vol. 23, n°1, p. 1-13
Chiappori P-A., Ekeland I. (1999), Disaggregation of excess demand functions in incomplete markets, Journal of Mathematical Economics, vol. 31, n°1, p. 111-129
Ekeland I. (1999), Agreeing on strategies, Nature, n°400, p. 623-624
Ekeland I. (1999), Counting up to four, Nature, n°397, p. 393-394
Ekeland I., Chiappori P-A. (1999), Aggregation and Market Demand: An Exterior Differential Calculus Viewpoint, Econometrica, vol. 67, n°6, p. 1435-1457
Ekeland I. (1998), Nonlinear modes of vibration, Nature, n°395, p. 116-117
Ekeland I. (1998), The big match, Nature, n°393, p. 411-413
Ekeland I. (1998), How to melt if you must, Nature, n°392, p. 654-657
Ghoussoub N., Ekeland I. (1998), Z 2-equivariant Ljusternik-Schnirelman theory for non-even functionals, Annales de l'Institut Henri Poincaré (C) Analyse non linéaire, vol. 15, n°3, p. 341-370
Ekeland I. (1997), What you eat is how many you are, Nature, n°389, p. 16-17
Tehrani H., Ekeland I., Ghoussoub N. (1996), Multiple Solutions for a Classical Problem in the Calculus of Variations, Journal of Differential Equations, vol. 131, n°2, p. 229-243
Zelati V., Ekeland I., Séré E. (1990), A variational approach to homolinic orbits in Hamiltonian systems, Mathematische Annalen, vol. 288, n°1, p. 133-160
D'Onofrio B., Ekeland I. (1990), Hamiltonian systems with elliptic periodic orbits, Nonlinear Analysis, vol. 14, n°1, p. 11-21
Hofer H., Ekeland I. (1990), Syplectic topology and Hamiltonian dynamics II, Mathematische Zeitschrift, vol. 203, n°1, p. 553-567
Hofer H., Ekeland I. (1989), Symplectic topology and Hamiltonian dynamics, Mathematische Zeitschrift, vol. 200, n°3, p. 355-378
Hofer H., Ekeland I. (1987), Convex Hamiltonian energy surfaces and their periodic trajectories, Communications in Mathematical Physics, vol. 113, n°3, p. 419-469
Coti Zelati V., Ekeland I., Ambrosetti A. (1987), Symmetry breaking in Hamiltonian systems, Journal of Differential Equations, vol. 67, n°2, p. 165-184
Ekeland I. (1984), A Morse Theory for Hamiltonian Systems, North-Holland Mathematics Studies, vol. 92, p. 165-172
Ekeland I. (1983), A perturbation theory near convex Hamiltonian systems, Journal of Differential Equations, vol. 50, n°3, p. 407-440
Clarke F., Ekeland I. (1982), Nonlinear oscillations and boundary value problems for Hamiltonian systems, Archive for Rational Mechanics and Analysis, vol. 78, n°4, p. 315-333
Ekeland I. (1979), Periodic solutions of Hamiltonian equations and a theorem of P. Rabinowitz, Journal of Differential Equations, vol. 34, n°3, p. 523-534
Ekeland I. (1974), Topologie differentielle et theorie des jeux, Topology, vol. 13, n°4, p. 375-388
Ekeland I. (1974), On the variational principle, Journal of Mathematical Analysis and Applications, vol. 47, n°2, p. 324-353
Ekeland I. (1972), Sur le contrôle optimal de systèmes gouvernés par des equations elliptiques, Journal of Functional Analysis, vol. 9, n°1, p. 1-62
Ouvrages
Lasry J-M., Lautier D., Fessler D., Ekeland I. (2013), The ocean as a global system, Portland, Oregon: ESKA, 162 p.
Elster J., Ekeland I. (2011), Théorie économique et rationalité, Paris: Vuibert, 87 p.
Touzi N., Çinlar E., Jouini E., Scheinkman J., Carmona R., Ekeland I. (2004), Paris-Princeton Lectures on Mathematical Finance 2003 Springer, 250 p.
Ekeland I., Kalika M., Chevalier J-M., Frison-Roche M-A. (2000), Internet et nos fondamentaux, Paris: PUF - Presses Universitaires de France, 128 p.
Ekeland I. (2000), Le meilleur des mondes possibles. Mathématiques et destinées., Paris: Le Seuil, 301 p.
Chevalier J-M., Frison-Roche M-A., Ekeland I. (1999), L'idée du service public est-elle encore soutenable ?, Paris: PUF - Presses Universitaires de France, 261 p.
Ekeland I. (1995), Le chaos, Paris: Flammarion, 127 p.
Ekeland I. (1991), Au hasard. La chance, la science et le monde, Paris: Le Seuil, 199 p.
Berestycki H., Coron J-M., Ekeland I. (1990), Variational Methods. Proceedings of a Conference. Paris, June 1988., Boston: Springer, 477 p.
Ekeland I. (1990), Convexity Methods in Hamiltonian Mechanics, Berlin: Springer, 247 p.
Ekeland I. (1984), Le calcul, l'imprévu, Paris: Le Seuil, 165 p.
Ekeland I., Turnbull T. (1983), Infinite-dimensional optimization and convexity, Chicago and London: University of Chicago Press, 166 p.
Aubin J-P., Bensoussan A., Ekeland I. (1981), Mathematical Techniques of Optimization, Control and Decision, Boston: Springer, 212 p.
Ekeland I. (1979), Eléments d'économie mathématique, Paris: Hermann, 279 p.
Temam R., Ekeland I. (1976), Convex Analysis and variational problems, Amsterdam: Elsevier, 402 p.
Chapitres d'ouvrage
Ekeland I., Jouini E. (2005), La modélisation économique en économie, in Yoccoz, Jean-Christophe, Les mathématiques dans le monde scientifique contemporain, Paris: Tec & Doc, p. 241-262
Directions d'ouvrage
Carmona R., Cinlar E., Ekeland I., Jouini E., Scheinkman J., Touzi N. (2007), Paris-Princeton Lectures on Mathematical Finance 2004, Berlin Heidelberg: Springer, 248 p.
Carmona R., Cinlar E., Ekeland I., Jouini E., Scheinkman J., Touzi N. (2004), Paris-Princeton Lectures on Mathematical Finance 2003, Berlin Heidelberg: Springer, 254 p.
Carmona R., Cinlar E., Ekeland I., Jouini E., Scheinkman J., Touzi N. (2003), Paris-Princeton Lectures on Mathematical Finance 2002, Berlin Heidelberg: Springer, 178 p.
Communications avec actes
Ekeland I. (1970), Suites minimisantes et solutions de certains problèmes de contrôle optimal, in A. V. Balakrishnan; M. Contensou; B. F. de Veubeke; P. Krée; J. L. Lions; N. N. Moiseev, Symposium on Optimization Held in Nice, June 29th – July 5th, 1969, Berlin Heidelberg, Springer, 79-84 p.
Communications sans actes
Ekeland I., Jaeck E., Lautier D., Villeneuve B. (2022), The joint dynamics of spot and futures prices, Commodity and energy conference - CEMA 2022, CHICAGO, États-Unis
Lautier D., Villeneuve B., Ekeland I., Jaeck E. (2019), Equilibrium relations between spot and futures markets, Commodities, Volatility and Risk Management: the impacts of trade restrictions, market imperfections, and green finance, Paris, France
Lautier D., Ekeland I., Villeneuve B. (2018), Hedging pressure and speculation in commodity futures markets, 2nd Commodity Winter Workshop, Nantes, France
Lautier D., Ekeland I., Villeneuve B. (2014), Speculation in commodity futures markets: A simple equilibrium model, séminaire Hotelling (RITM – ENS CACHAN), Paris, France
Villeneuve B., Ekeland I., Lautier D. (2013), A simple equilibrium model for a commodity market with spot trades and futures contracts, 30th International French Finance Association Conference, Lyon, France
Présentation(s) dans un séminaire de recherche
Ekeland I., Jaeck E., Lautier D., Villeneuve B. (2019), “Equilibrium relations between the spot and futures markets for commodities: an infinite horizon model”,, in Center for Environmental Economics Montpellier, Montpellier
Prépublications / Cahiers de recherche
Doyen L., Smith M., Sumaila U., Zaccour G., Ekeland I., Cury P., Lett C., Thebaud O., Poggiale J-C., Moussaoui A., Fromentin J-M., Gourguet S., Guillotreau P., Gomes H., Courtois P., Schaap R-J., Blanchard F., Rainer C., Villain T., Menard F., Sari T. (2024), Mathematical Bio-Economics 2.0 for Sustainable Fisheries, Paris, Cahier de recherche CEREMADE, Université Paris Dauphine-PSL, 30 p.
Ekeland I., Séré É. (2023), A local surjection theorem with continuous inverse in Banach spaces, Paris, Cahier de recherche CEREMADE, Université Paris Dauphine-PSL, 14 p.
Ekeland I., Séré E. (2018), A surjection theorem for singular perturbations with loss of derivatives, Paris, Cahier de recherche CEREMADE, Université Paris Dauphine-PSL, 24 p.
Séré E., Ekeland I. (2014), An implicit function theorem for non-smooth maps between Fréchet spaces, Paris, Université Paris-Dauphine, 24 p.
Long Y., Zhou Q., Ekeland I. (2012), Economic growth and sustainable development: how should we discount the future?, Paris, Cahiers de la Chaire Finance et Développement Durable, 47 p.
Ekeland I. (2010), Discounting the Future: the Case of Climate Change, Paris, Cahiers de la Chaire Finance et Développement Durable, 31 p.
Pareja C., Ekeland I., Sumaila U. (2009), Fisheries Management and Intergenerational Equity, Paris, Cahiers de la Chaire Finance et Développement Durable, 26 p.
Ekeland I., Carlier G. (2003), Optimal transportation and the structure of cities, Paris, Université Paris-Dauphine, 34 p.
Carlier G., Levin V., Ekeland I., Shananin A. (2002), A system of inequalities arising in mathematical economics and connected with the Monge-Kantorovich problem, Paris, Cahiers du CEREMADE, 13 p.
Chiappori P-A., Ekeland I., Kubler F., Polemarchakis H. (1999), The identification of preferences from equilibrium prices, Louvain, CORE Discussion Papers, 22 p.