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Ivar Ekeland
Ivar Ekeland (born 2 July 1944, Paris) is a French mathematician of Norwegian descent. Ekeland has written influential monographs and textbooks on nonlinear functional analysis, the calculus of variations, and mathematical economics, as well as popular books on mathematics, which have been published in French, English, and other languages. Ekeland is known as the author of Ekeland's variational principle and for his use of the Shapley–Folkman lemma in optimization theory. He has contributed to the periodic solutions of Hamiltonian systems and particularly to the theory of Kreĭn indices for linear systems (Floquet theory).〔According to D. Pascali, writing for ''Mathematical Reviews'' ()
〕 Ekeland helped to inspire the discussion of chaos theory in Michael Crichton's 1990 novel ''Jurassic Park''.〔
==Biography==
Ekeland studied at the École Normale Supérieure (1963–1967). He is a Senior Research Fellow at the French National Centre for Scientific Research (CNRS). He obtained his doctorate in 1970. He teaches mathematics and economics at the Paris Dauphine University, at the École Polytechnique, at the École Spéciale Militaire de Saint-Cyr, and at the University of British Columbia in Vancouver. He was the chairman of Paris-Dauphine University from 1989 to 1994.
Ekeland is a recipient of the D'Alembert Prize and the Jean Rostand prize. He is also a member of the Norwegian Academy of Science and Letters.〔(【引用サイトリンク】url=http://www.dnva.no/c40134/artikkel/vis.html?tid=40147 )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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