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Many-valued mappings and Borel sets. II. (English) Zbl 0255.54010

MSC:
54C60 Set-valued maps in general topology
54C05 Continuous maps
54C10 Special maps on topological spaces (open, closed, perfect, etc.)
54H05 Descriptive set theory (topological aspects of Borel, analytic, projective, etc. sets)
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