Nonconvex minimization problems

缩小 数学 数学优化 计算机科学 应用数学
作者
Ivar Ekeland
出处
期刊:Bulletin of the American Mathematical Society [American Mathematical Society]
卷期号:1 (3): 443-474 被引量:1012
标识
DOI:10.1090/s0273-0979-1979-14595-6
摘要

I. The central result II.The weak statement A. Fixed point theorems B. Nonlinear semigroups C. Optimization and control D. Existence of solutions III.The full statement A. Mathematical programming B. Control theory C. Calculus IV.The local statement A. Geometry of Banach spaces B. Global analysis V. By way of conclusion I.The central result.The grandfather of it all is the celebrated 1961 theorem of Bishop and Phelps (see [7], [8]) that the set of continuous linear functionals on a Banach space E which attain their maximum on a prescribed closed convex bounded subset X c E is norm-dense in £*.The crux of the proof lies in introducing a certain convex cone in E, associating with it a partial ordering, and applying to the latter a transfinite induction argument (Zorn's lemma).This argument was later used in different settings by Brondsted and Rockafellar (see [9]) and by F. Browder (see [11]).The various situations can be adequately summarized in a diagram:This paper surveys my 1972 result on the variational principle and the various advances and applications which have been registered since.They stretch over a vast field of mathematics, from control theory to global analysis, and it is hoped that every mathematician will find something to enjoy.This should be possible, because the ideas involved are quite simple, and I have tried not to obscure them by too technical or detailed an exposition; the reader will be referred to the original papers for the more peripheral lemmas; received by the editors September 1, 1978.
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