Implicit Functions and Solution Mappings
Implicit Functions and Solution Mappings
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DOI:
10.1007/978-0-387-87821-8
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发表时间:
2009-07
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影响因子:
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通讯作者:
A. Dontchev;R. Rockafellar
中科院分区:
文献类型:
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作者:
A. Dontchev;R. Rockafellar
The preparation of this second edition of our book was triggered by a rush of fresh developments leading to many interesting results. The text has significantly been enlarged by this important new material, but it has also been expanded with coverage of older material, complementary to the results in the first edition and allowing them to be further extended. We hope in this way to have provided a more comprehensive picture of our subject, from classical to most recent. Chapter 1 has a new preamble which better explains our approach to the implicit function paradigm for solution mappings of equations, variational problems, and beyond. In the new Sect. 1.8 [1H], we present an implicit function theorem for functions that are merely continuous but, on the other hand, are monotone. Substantial additions start appearing in Chap. 4, where generalized differentiation is brought in. The coderivative criterion for metric regularity has now a proof in 4.3 [4C]. Section 4.4 [4D] has been reconstituted to follow up with the strict derivative condition for metric regularity and immediately go on to the inverse function theorems of Clarke and Kummer, and an inverse function theorem for nonsmooth generalized equations whose proof is postponed until Chap. 6. In that way, all basic regularity properties are fully supplied with criteria involving generalized derivatives.Chapter 5, dealing with infinite-dimensional branches of the theory, has been augmented by much more. Section 5.7 [5G] presents parametric inverse function theorems which are later put to use in Chap. 6. Section 5.8 [5H] translates the result to nonlinear metric spaces and furnishes a new proof to the (extended) Lyusternik–Graves theorem. Section 5.9 [5I] links the Lyusternik–Graves theorem, fixed point theorems, and other results in set-valued analysis. The final Sect. 5.11 [5K] deploys an inverse function theorem in Banach spaces which relies only on selections of the inverse to the directional derivative.