Literature Cited
N. Bourbaki, General Topology, Addison-Wesley (1961).
A. A. Tolstonogov, “Topological structure of continuous multivalued mappings,” Sib. Mat. Zh.,16, No. 4, 837–852 (1975).
Additional information
Siberian Energy Institute, Siberian Branch, Academy of Sciences of the USSR, Irkutsk. Translated from Sibirskii Matematicheskii Zhurnal, Vol. 20, No. 2, pp. 409–411, March–April, 1979.
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Brandt, I.S. Semicontinuity of certain functions related to a multivalued mapping. Sib Math J 20, 293–294 (1979). https://doi.org/10.1007/BF00970038
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DOI: https://doi.org/10.1007/BF00970038