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MATHEMATICS
On the cardinality of sets of closed classes of finite height in $P_{\aleph_0}$
G. P. Gavrilov Moscow Power Engineering Institute in Smolensk
Citation:
G. P. Gavrilov, “On the cardinality of sets of closed classes of finite height in $P_{\aleph_0}$”, Dokl. Akad. Nauk SSSR, 158:3 (1964), 503–506
Linking options:
https://www.mathnet.ru/eng/dan30119 https://www.mathnet.ru/eng/dan/v158/i3/p503
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