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Cumulative quasicontinuity of multivalued mappings
Nesterenko Vasyl Volodymyrovych 1
1 Department of Mathematical Analysis, Yuriy Fedkovych Chernivtsi National University, Chernivtsi, 58000, Ukraine
Keywords: quasicontinuity, multivalued mappings
Abstract

Let $X$ be a Baire space, $Y$ be a first /second/ countable space and $Z$ be a normal space. We show that if a closed-valued multifunction $f: X × Y → Z$ is both lower and upper horizontally quasicontinuous and both lower and upper continuous /quasicontinuous/ with respect to the second variable, then it is jointly lower and upper quasicontinuous.

References

[1] Kempisty S. Sur les fuctions quasicontinues // Fund. Math. - 1932. - 19. - P. 184 - 197.

[2] Neubrunn T. Quasi-continuity // Real Anal. Exch. - 1988. -1989. - 14, № 3. - P. 259 - 306.

[3] Maslyuchenko V.K., Nesterenko V.V. Cumulative continuity and quasi-continuity of horizontally quasi-continuous functions / / Ukr. Mat. Journal - 2000. 52, № 12. - P. 1711- 1714.

[4] Nesterenko V.V. On one characterization of cumulative quasi-continuity // Scientific Bulletin of Chernivtsi University: Collection of scientific papers. Issue 336-337. Mathematics. Chernivtsi: Ruta. 2007, - P. 137 - 141.

Cite
ACS Style
Nesterenko, V.V. Cumulative quasicontinuity of multivalued mappings. Bukovinian Mathematical Journal. 2018, 1
AMA Style
Nesterenko VV. Cumulative quasicontinuity of multivalued mappings. Bukovinian Mathematical Journal. 2018; 1(349).
Chicago/Turabian Style
Vasyl Volodymyrovych Nesterenko. 2018. "Cumulative quasicontinuity of multivalued mappings". Bukovinian Mathematical Journal. 1 no. 349.
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