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// Algebra i logika
// Archive
Algebra i Logika. Sem.,
1963
Volume 2,
Number 2,
Pages
47–56
(Mi al981)
This article is cited in
2
papers
Operations on sets
A. A. Lyapunov
Received: 27.03.1963
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Steklov Math. Inst. of RAS
, 2024