scientific article; zbMATH DE number 3256585
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Publication:5542851
zbMath0159.32603MaRDI QIDQ5542851
Publication date: 1967
Full work available at URL: https://eudml.org/doc/12369
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Stefan Schwarz (1914–1996), Unnamed Item, On a sharp estimation in the theory of binary relations on a finite set, On the semigroup of binary relations on a finite set, A new approach to some problems in the theory of non-negative matrices
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