Abstract
We consider Carathéodory functions f : T × X → Y, where T is a topological space with regular σ-finite measure, the spaces X and Y are metrizable and separable, and X is locally compact. We show that every function of this sort possesses the Scorza-Dragoni property. A similar result is also established in the case where the space T is locally compact and X = ℝ∞.
Similar content being viewed by others
REFERENCES
G. Scorza-Dragoni, “Un teorema sulle funzioni continue rispetto ad una e misurabili rispetto ad un'altra variable,” Rend. Semin. Mat. Univ. Padova, 17, 102–108 (1948).
E. B. Van Vleck, “A proof of some theorems on pointwise discontinuous function,” Trans. Amer. Math. Soc., 8, 189–204 (1907).
Z. Piotrowski, “Separate and joint continuity,” Real. Anal. Exch., 11, No.2, 293–322 (1985-1986).
Z. Piotrowski, “Separate and joint continuity. II,” Real. Anal. Exch., 15, No.1, 248–258 (1989-1990).
V. K. Maslyuchenko, V. V. Mykhailyuk, and O. V. Sobchuk, “An investigation of separately continuous mappings,” in: Proceedings of the International Mathematical Conference Dedicated to the Memory of Hans Hahn [in Ukrainian], Ruta, Chernovtsy (1995), pp. 192–246.
B. Ricceri and A. Villani, “Separability and Scorza-Dragoni's property,” Le Matematiche, 37, No.1, 156–161 (1982).
C. Castaign, “Une nouvelle extension du theoreme de Dragoni-Scorza,” C. R. Acad. Sci., Ser. A, 271, 396–398 (1970).
D. Averna and A. Fiacca, “Sulle proprieta di Scorza-Dragoni,” Atti Semin. Mat. Fis. Univ. Modena, 33, No.2, 313–318 (1984).
J. C. Oxtoby, Measure and Category, Springer, New York (1971).
H. Hahn, Theorie der Reellen Funktionen, Springer, Berlin (1921).
J. C. Breckenridge and T. Nichiura, “Partial continuity, quasicontinuity, and Baire spaces,” Bull. Inst. Math. Acad. Sinica, 4, No.2, 191–203 (1976).
V. K. Maslyuchenko, “Joint continuity of separately continuous mappings,” in: S. D. Ivasyshen (editor), Boundary-Value Problems with Various Degenerations and Singularities [in Ukrainian], Chernovtsy (1990), pp. 143–159.
V. K. Maslyuchenko and O. V. Sobchuk, Perfect Normality of a Space of Finite Sequences [in Ukrainian], Dep. at DNTB Ukr., No. 1610-UK91, Kiev (1991).
R. Engelking, General Topology, PWN, Warsaw (1977).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Gaidukevich, O.I., Maslyuchenko, V.K. New Generalizations of the Scorza-Dragoni Theorem. Ukrainian Mathematical Journal 52, 1010–1017 (2000). https://doi.org/10.1023/A:1005217430845
Issue Date:
DOI: https://doi.org/10.1023/A:1005217430845