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First level Borel isomorphisms. (English. Russian original) Zbl 0424.54030

Sov. Math., Dokl. 20, 890-893 (1979); translation from Dokl. Akad. Nauk SSSR 247, 1309-1312 (1979).

MSC:

54H05 Descriptive set theory (topological aspects of Borel, analytic, projective, etc. sets)
54C10 Special maps on topological spaces (open, closed, perfect, etc.)
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