Identyfikatory
Warianty tytułu
Języki publikacji
Abstrakty
Let B(X) denote the family of all nonempty closed bounded subsets of a real Banach space X, endowed with the Hausdorff metric. For E, F ∈ B (X) we set [formula]. Let D denote the closure (under the maximum distance) of the set of all (E, F) ∈ B (X) x B (X) such that λE,F > 0. It is proved that the set of all (E, F) ∈ D for which the minimization problem [formula] fails to be well posed in a σ-porous subset of D.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
73--82
Opis fizyczny
Bibliogr. 16 poz.
Twórcy
autor
autor
- AGH University of Science and Technology, Faculty of Applied Mathematics, al. Mickiewicza 30, 30-059 Cracow [Myjak, J.], myjak@univaq.it
Bibliografia
- [1] F.S. De Blasi, J. Myjak, Sur la porosité des ensemble des contractions sans point fixe, C.R. Acad. Sci. Paris 308 (1989), 51–54.
- [2] F.S. De Blasi, J. Myjak, P.L. Papini, Starshaped sets and best approximation, Arch. Math. 56 (1991), 41–48.
- [3] F.S. De Blasi, J. Myjak, P.L. Papini, Porous sets in best approximation theory, J. London Math. Soc. 44 (1991), 135–142.
- [4] F.S. De Blasi, J. Myjak, P.L. Papini, On mutually nearest and mutually furthest points of sets in Banach spaces, J. Approx. Theory 70 (1992), 142–155.
- [5] J.M. Borwein, S. Fitzpatrick, Existence of nearest points in Banach spaces, Can. J. Math. 41 (1989), 702–720.
- [6] S.V. Konjagin, On approximation properties of closed sets in Banach spaces and characterization of strongly convex spaces, Soviet Math. Dokl. 21 (1980), 418–422.
- [7] C. Li, On mutually nearest and mutually furthest points in reflexive Banach spaces, J. Approx. Theory, 103 (2000), 1–17.
- [8] C. Li, On well-posedness of best simultaneous approximation problems in Banach spaces, Science in China (Ser A), 44 (2001), 1558–1570.
- [9] C. Li, J. Myjak, On mutually nearest points of unbounded sets in Banach spaces, J. Nonlinear Convex Anal. 8 (2007), 165–177.
- [10] C. Li, R.X. Ni, On well-posed mutually nearest and mutually furthest point problems in Banach spaces, Acta Math. Sinica, New Ser. 20 (2004), 147–156.
- [11] C. Li, H.K. Xu, On almost well-posed mutually nearest and mutually furthest points problems, Numer. Funct. Anal. Optim. 23 (2002), 323–331.
- [12] C. Li, H.K. Xu, Porosity of mutually nearest and mutually furthest points in Banach spaces, J Approx. Theory 125 (2003), 10–25.
- [13] S. Reich, A.J. Zaslavski, Well-posedness and porosity in best approximation problems, Topol. Methods Nonlinear Anal. 18 (2001), 395–408.
- [14] S. Reich, A.J. Zaslavski, A porosity results in best approximation theory, J. Nonlinear Convex Anal. 4 (2003), 165–173.
- [15] S. Reich, A.J. Zaslavski, Well-posedness of generalized best approximation problems, Nonlinear Funct. Anal. Appl. 7 (2002), 115–128.
- [16] S. Reich, A.J. Zaslavski, Porous sets and generalized best approximation problems, Nonlinear Anal. Forum 9 (2004), 135–152.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-AGH9-0002-0006