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In recent years, convergence results for multivalued functions have been developed and used in several areas of applied mathematics: mathematical economics, optimal control, mechanics, etc. The aim of this note is to give a criterion of almost sure convergence for multivalued asymptotic martingales (amarts). For every separable Banach space B the fact that every L^1-bounded B- valued martingale converges a.s. in norm to an integrable B-valued random variable (r.v.) is equivalent to the Radon-Nikodym property [6]. In this paper we solve the problem of a.s. convergence of multivalued amarts by giving a topological characterization.
Wydawca
Rocznik
Tom
Strony
93--99
Opis fizyczny
Bibliogr. 11 poz.
Twórcy
autor
- Institute of Mathematics, Maria Curie-Skłodowska University, Pl. Marii Curie-Skłodowskiej 1, 20-031 Lublin, Poland
autor
- Institute of Mathematics, Maria Curie-Skłodowska University, Pl. Marii Curie-Skłodowskiej 1, 20-031 Lublin, Poland
Bibliografia
- [1] P. Billingsley, Convergence of Probability Measures, Wiley-Interscience, New York, 1968.
- [2] C. H. Castaing and M. Valadier, Convex Analysis and Measurable Multifunctions, Lecture Notes in Math. 580, Springer, Berlin, 1977.
- [3] A. Gut and K. D. Schmidt, Amarts and Set Function Processes, Lecture Notes In Math. 1042, Springer, Berlin, 1983.
- [4] F. Hiai, Convergence of conditional expectations and strong laws of large numbers for multivalued random variables, Trans. Amer. Math. Soc. 291 (1985), 613-627.
- [5] F. Hiai and H. Umegaki, Integrals, conditional expectations, and martingales of multivalued functions, J. Multivariate Anal. 7 (1977), 149-182.
- [6] Ł. Kruk and W. Zięba, On (B; ϱ)-amarts and almost sure convergence, Teor. Veroyatnost. i Primenen. 40 (1995), 677-685 (in Russian).
- [7] -, -, A criterion of almost sure convergence of asymptotic martingales in a Banach space, Yokohama Math. J. 43 (1995), 61-72.
- [8] K. Kuratowski and C. Ryll-Nardzewski, A general theorem on selectors, Bull. Acad. Polon. Sci. Sér. Sci. Math. Astronom. Phys. 13 (1965), 397-403.
- [9] D. Q. Luu, Applications of set-valued Radon-Nikodym theorems to convergence of multivalued L1-amarts, Math. Scand. 54 (1984), 101-113.
- [10] G. Matheron, Random Sets and Integral Geometry, Wiley, New York, 1975.
- [11] Y. Sonntag and C. Zalinescu, Set convergences. An attempt of classification, Trans. Amer. Math. Soc. 340 (1993), 199-226.
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Bibliografia
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bwmeta1.element.baztech-article-BAT5-0004-0008