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Exact separation theorem for disjoint closed sets in Hilbert spaces

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Abstract

Using techniques of variational analysis and in terms of proximal normal cones, we establish exact separation results for finitely many disjoint closed sets in Hilbert spaces without compactness assumption, which supplement some existing fuzzy separation theorems as well as approximate projection theorems. With the help of separation results for closed sets, we provide necessary optimality conditions for optimal solutions in terms of proximal subdifferentials.

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References

  1. Bui, H.T., Kruger, A.Y.: About extensions of the extremal principle. Vietnam J. Math. 46(2), 215–242 (2018)

    Article  MathSciNet  Google Scholar 

  2. Bui, H.T., Kruger, A.Y.: Extremality, stationarity and generalized separation of collections of sets. J. Optim. Theory Appl. 182(1), 211–264 (2019)

    Article  MathSciNet  Google Scholar 

  3. Clarke, F.H., Ledyaev, Y.S., Stern, R.J., Wolenski, P.R.: Nonsmooth Analysis and Control Theory. Springer-Verlag, New York (1998)

    Google Scholar 

  4. Gadhi, N.A., Dempe, S., El Idrissi, M.: New optimality conditions for bilevel programs by using an exact separation principle. Optim. Lett. 14(6), 1381–1392 (2020)

    Article  MathSciNet  Google Scholar 

  5. Gadhi, N.A., Hamdaoui, K.: Optimality results for a specific fractional problem. J. Ind. Manag. Optim. 18(1), 367–373 (2021)

    Article  MathSciNet  Google Scholar 

  6. Kruger, A.Y.: Generalized differentials of nonsmooth functions, and necessary conditions for an extremum. Sib. Math. J. 26(3), 370–379 (1985)

    Article  MathSciNet  Google Scholar 

  7. Kruger, A.Y., López, M.A.: Stationarity and regularity of infinite collections of sets. J. Optim. Theory Appl. 154(2), 339–369 (2012)

    Article  MathSciNet  Google Scholar 

  8. Kruger, A.Y., Mordukhovich, B.S.: Extremal points and the Euler equation in nonsmooth optimization problems. Dokl. Akad. Nauk BSSR 24(8), 684–687 (1980)

    MathSciNet  Google Scholar 

  9. Li, G., Ng, K.F., Zheng, X.Y.: Unified approach to some geometric results in variational analysis. J. Funct. Anal. 248(2), 317–343 (2007)

    Article  MathSciNet  Google Scholar 

  10. Mordukhovich, B.S.: Variational Analysis and Generalized Differentiation II: Applications. Springer, Berlin (2006)

    Book  Google Scholar 

  11. Mordukhovich, B.S.: Variational Analysis and Applications. Springer, Berlin (2018)

    Book  Google Scholar 

  12. Mordukhovich, B.S., Pérez-Aros, P.: New extremal principles with applications to stochastic and semi-infinite programming. Math. Program. 189(1–2), 527–553 (2021)

    Article  MathSciNet  Google Scholar 

  13. Mordukhovich, B.S., Phan, H.M.: Tangential extremal principles for finite and infinite systems of sets, I: basic theory. Math. Program. 136(1), 3–30 (2012)

    Article  MathSciNet  Google Scholar 

  14. Mordukhovich, B.S., Phan, H.M.: Tangential extremal principles for finite and infinite systems of sets II: applications to semi-infinite and multiobjective optimization. Math. Program. 136(1), 31–63 (2012)

    Article  MathSciNet  Google Scholar 

  15. Mordukhovich, B.S., Shao, Y.: Extremal characterizations of Asplund spaces. Proc. Am. Math. Soc. 124(1), 197–205 (1996)

    Article  MathSciNet  Google Scholar 

  16. Mordukhovich, B.S., Treiman, J.S., Zhu, Q.J.: An extended extremal principle with applications to multiobjective optimization. SIAM J. Optim. 14(2), 359–379 (2003)

    Article  MathSciNet  Google Scholar 

  17. Ngai, H.V., Théra, M.: A fuzzy necessary optimality condition for non-Lipschitz optimization in Asplund spaces. SIAM J. Optim. 12(3), 656–668 (2002)

    Article  MathSciNet  Google Scholar 

  18. Phelps, R.R.: Convex Functions, Monotone Operators and Differentiability. Springer, Berlin (2009)

    Google Scholar 

  19. Pontryagin, L.S., Boltyanskii, V.G., Gamkrelidze, R.V., Mishchenko, E.F.: The Mathematical Theory of Optimal Processes. Wiley, New York (1962)

    Google Scholar 

  20. Zheng, X.Y.: Attainable separation property and asymptotic hyperplane for a closed convex set in a normed space. J. Math. Anal. Appl. 489(1), 124121 (2020)

    Article  MathSciNet  Google Scholar 

  21. Zheng, X.Y., Ng, K.F.: The Lagrange multiplier rule for multifunctions in Banach spaces. SIAM J. Optim. 17(4), 1154–1175 (2007)

    Article  MathSciNet  Google Scholar 

  22. Zheng, X.Y., Ng, K.F.: Linear regularity for a collection of subsmooth sets in Banach spaces. SIAM J. Optim. 19(1), 62–76 (2008)

    Article  MathSciNet  Google Scholar 

  23. Zheng, X.Y., Ng, K.F.: A unified separation theorem for closed sets in a Banach space and optimality conditions for vector optimization. SIAM J. Optim. 21(3), 886–911 (2011)

    Article  MathSciNet  Google Scholar 

  24. Zheng, X.Y., Ng, K.F.: Proximal normal cone analysis on smooth Banach spaces and applications. SIAM J. Optim. 24(1), 363–384 (2014)

    Article  MathSciNet  Google Scholar 

  25. Zheng, X.Y., Yang, Z., Zou, J.: Exact separation theorem for closed sets in Asplund spaces. Optimization 66(7), 1065–1077 (2017)

    Article  MathSciNet  Google Scholar 

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Acknowledgements

The authors would like to express their gratitude to the referees and editors for their helpful comments and constructive suggestions which helped us to improve the quality of this work.

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Correspondence to Binbin Zhang.

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This research was supported by the National Natural Science Foundation of China (Grant No. 11971211).

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Zhang, B., Yu, F. Exact separation theorem for disjoint closed sets in Hilbert spaces. Optim Lett 18, 561–574 (2024). https://doi.org/10.1007/s11590-023-02016-6

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  • DOI: https://doi.org/10.1007/s11590-023-02016-6

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