In this paper we prove a representation result for essentially bounded multivalued martingales with nonempty closed convex and bounded values in a real separable Banach space. Then we turn our attention to the interplay between multimeasures and multivalued Riesz representations. Finally, we give the multivalued Radon-Nikodym property.
Sia uno spazio di Banach reale, separabile e la classe dei sottoinsiemi non vuoti, chiusi, limitati e convessi di . Si dimostra un risultato di rappresentazione per martingale essenzialmente limitate a valori in . Quindi rivolgiamo la nostra attenzione al legame tra misure multivoche e rappresentazioni di Riesz a valori multivoci. Infine, diamo la versione multivoca del teorema di Radon-Nikodym.
@article{BUMI_2004_8_7B_2_453_0,
author = {Mohamed Zohry},
title = {On multivalued martingales, multimeasures and multivalued Radon-Nikodym property},
journal = {Bollettino dell'Unione Matematica Italiana},
volume = {7-A},
year = {2004},
pages = {453-468},
zbl = {1123.46302},
mrnumber = {2072947},
language = {en},
url = {http://dml.mathdoc.fr/item/BUMI_2004_8_7B_2_453_0}
}
Zohry, Mohamed. On multivalued martingales, multimeasures and multivalued Radon-Nikodym property. Bollettino dell'Unione Matematica Italiana, Tome 7-A (2004) pp. 453-468. http://gdmltest.u-ga.fr/item/BUMI_2004_8_7B_2_453_0/
[1] , Integrals of set-valued functions, J. Math. Anal. Appl., 12 (1965), 1-12. | MR 185073 | Zbl 0163.06301
[2] , Geometric aspects of convex sets with the Radon-Nikodym property, Lecture notes in Math., 993, Springer-Verlag, Berlin, 1983. | MR 704815 | Zbl 0512.46017
[3] , On Convergence of Multivalued Martingales and Uniform Amarts indexed by Directed Sets, Boll. Un. Mat. Ital. B (7), 4 (1990), 553-565. | MR 1073634 | Zbl 0721.60053
[4] -, Convex Analysis and measurable multifunctions, Lecture notes in Math., 580, Springer-Verlag, Berlin, 1977. | MR 467310 | Zbl 0346.46038
[5] , Martingales of Banach-valued random variables, Bull. Amer. Math. Soc., 66 (1960), 395-398. | MR 119242 | Zbl 0102.13601
[6] , A note on the convergence of Banach space-valued martingales, Math. Ann., 153 (1964), 142-149. | MR 161376 | Zbl 0125.36703
[7] , Martingale convergence and the Radon-Nikodym theorem in Banach spaces, Math. Scand., 22 (1968), 21-41. | MR 246341 | Zbl 0175.14503
[8] , Vector values martingales and their applications, Proc. of the conf. in Probability Theory in Banach spaces, Oberwolfah (1975), Lecture Notes in Math, 256, Springer, Berlin (1976), 33-51. | MR 517905 | Zbl 0336.60049
[9] , La Propriété de Radon-Nikodym en intégration multivoque, C. R. Acad. Sci. Paris, 280 (1975), 1515-1518. | MR 374371 | Zbl 0313.28007
[10] , Contribution à la Théorie de l'intégration multivoque, Thèse de Doctorat d'Etat, Université Paris VI (1977).
[11] -, A convergence theorem for convex set valued supermartingales, Stoch. Anal. Appl., 3 (1985), 433-445. | MR 808943 | Zbl 0575.60042
[12] , A general dominated convergence theorem for unbounded randon sets, Bull. Ac. Pol. Sc. Math., 44, 3 (1996). | MR 1419408 | Zbl 0879.60049
[13] -, Integrals, Conditional expectation, and martingales of multivalued functions, J. Multivariate Anal., 7 (1977), 149-182. | MR 507504 | Zbl 0368.60006
[14] -, Radon-Nikodym theorems for set-valued measures, J. Multivariate Anal., 8 (1978), 96-118. | MR 583862 | Zbl 0384.28006
[15] , Mesurable relations, Fund. Math., 87 (1975), 53-72. | MR 367142 | Zbl 0296.28003
[16] -, Uspehi Math., 23, 6 (1968), 51-116. | Zbl 0167.42202
[17] , Quelques résultats de représentation des amars uniformes multivoques, C. R. Acad. Sci. Paris, 300 (1985), 63-65. | MR 777611 | Zbl 0582.60056
[18] , Convergence presque sûre de martingales multivoques, Ann. Inst. H. Poincaré, 8, 1 (1972), 1-7. | MR 331504 | Zbl 0235.60010
[19] , Characterization of Set-Valued Conditional Expectation for a class of Multivalued Random Variables, Preprint, (2001). | MR 2255880 | Zbl 1110.60002