Abstract
In this paper we first review the theory of weak differentiability with some improvements and unifications of existing results; then we introduce an extended variant of this notion and establish its basic properties; finally we use the weak differentiability and its variant to develop new calculus results in variational analysis for the theory of generalized differentiation and the sequential normal compactness. In this way we demonstrate that the weak differentiability and its variant, in contrast to the usual differentiability, are in fact more suitable for Fréchet and limiting/Mordukhovich constructions in variational analysis.
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Borwein, J.M., Preiss, D.: A smooth variational principle with applications to subdifferentibility and to differentiability of convex functions. Trans. Amer. Math. Soc. 303(2), 517–527 (1987)
Borwein, J.M., Strójwas, H.M.: Tangential approximations. Nonlinear Anal. 9, 1347–1366 (1985)
Borwein, J.M., Vanderwerff, J.D.: Convex Functions, Constructions, Characterizations and Counterexamples. Cambridge University Press (2010)
Borwein, J.M., Zhu, Q.J.: Techniques of Variational Analysis. Springer (2005)
Clarke, F.H.: Optimization and Nonsmooth Analysis. Wiley, New York (1983)
Clarke, F.H., Ledyaev, Yu.S., Stern, R.J., Wolenski, P.R.: Nonsmooth Analysis and Control Theory. Springer, New York (1998)
Diestel, J.: Sequences and Series in Banach Spaces. Springer, New York (1984)
Facchinei, F., Pang, J.-S.: Finite-dimensional Variational Inequalities and Complementary Problems, Vol. I and II. Springer, New York (2003)
Giles, J.R., Sciffer, S.: Continuity characterisations of differentiability of locally Lipschitz functions. Bull. Austral. Math. Soc. 41, 371–380 (1990)
Lowen, P.D.: Limits of Fréchet normals in nonsmooth analysis. In: Ioffe, A.D., et al. (eds.) Optimization and Nonlinear Analysis, Pitman Res. Notes math. Ser., vol. 244, pp 178–188. Longman, Harlow (1992)
Mordukhovich, B.S.: Metric approximations and necessary optimality conditions for general classes of extremal problems. Soviet Math. Dokl. 22, 526–530 (1980)
Mordukhovich, B.S.: Approximation method in problems of optimization and control. Nauka, Moscow (1988)
Mordukhovich, B.S.: Coderivatives of set-valued mappings: Calculus and applications. Nonlinear Anal 30, 3059–3070 (1997)
Mordukhovich, B.S.: Variational Analysis and Generalized Differentiation I: Basic Theory. Springer, Berlin (2006)
Mordukhovich, B.S.: Variational Analysis and Generalized Differentiation II: Applications. Springer, Berlin (2006)
Mordukhovich, B.S., Shao, Y.: Nonsmooth sequential analysis in Asplund spaces. Trans. Amer. Math. Soc. 348, 1235–1280 (1996)
Mordukhovich, B.S., Shao, Y.: Nonconvex coderivative calculus for infinite-dimensional multifunctions. Set-Valued Anal 4, 205–236 (1996)
Mordukhovich, B.S., Shao, Y.: Stability of set-valued mappings in infinite dimensions: Point criteria and applications. SIAM J. Control Optim. 35(1), 285–314 (1997)
Mordukhovich, B.S., Wang, B.: Sequential normal compactness in variational analysis. Nonlinear Anal 47, 717–728 (2001)
Mordukhovich, B.S., Wang, B.: Differentiability and regularity of Lipschitzian mappings. Proc. Amer. Math. Soc. 131(2), 389–399 (2002)
Mordukhovich, B.S., Wang, B.: Extensions of generalized differential calculus in Asplund spaces. J. Math. Anal. Appl. 272, 164–186 (2002)
Mordukhovich, B.S., Wang, B.: Normal compactness conditions in variational analysis. In: Proceedings of the 41st IEEE Conference on Decision and Control, pp 3539–3544 (2002)
Modukhovich, B.S., Wang, B.: Calculus of sequential normal compactness in variational analysis. J. Math. Anal. Appl. 282, 63–84 (2003)
Phelps, R.R.: Convex Functions, Monotone Operators and Differentiability, 2nd edn. Springer, Berlin (1993)
Rockafellar, R.T.: Convex Analysis. Princeton, New Jersey (1970)
Rockafellar, R.T.: Directional Lipschitzian functions and subdifferential calculus. Proc. London Math. Soc. 39, 331–355 (1979)
Rockafellar, R.T., Wets, R.J.-B.: Variational Analysis. Springer, Berlin (1998)
Rudin, W.: Functional Analysis, 2nd edn. McGraw-Hill (1991)
Thibault, L.: Sous-différentiel de fonctions vectorielles compactement lipschitziennes. C. R. Acad. Sc. Paris 286, 995–998 (1978)
Thibault, L.: On compactly Lipschitzian mappings, recent advances in optimization. In: Gritzmann, P., et al. (eds.) Lecture Notes in Econ. Math. Syst., Ser., vol. 456, pp 356–364. Springer, Berlin (1997)
Wang, B.: Beginning Variational Analysis (lecture notes). Bohai University, Jinzhou (2010)
Wang, B., Zhu, M., Zhao, Y.: Generalized sequential normal compactness in Banach spaces. Nonlinear Anal 79, 221–232 (2013)
Wang, B., Wang, D.: Generalized sequential normal compactness in Asplund spaces. Applicable Anal (2014). doi:10.1080/00036811.2013.879384
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The work of the second author was partially supported by the National Science Foundation of China (Grant No. 11431004).
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Wang, B., Yang, X. Weak Differentiability with Applications to Variational Analysis. Set-Valued Var. Anal 24, 299–321 (2016). https://doi.org/10.1007/s11228-015-0341-8
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DOI: https://doi.org/10.1007/s11228-015-0341-8
Keywords
- Differentiability
- ß-differentiability
- Weak differentiability
- Uniform weak differentiability
- Variational analysis
- Generalized differentiation
- Sequential normal compactness