Regular elements of the semigroup of all binary relations
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Publication:1237166
DOI10.1007/BF02194925zbMath0355.20058MaRDI QIDQ1237166
Publication date: 1976
Published in: Semigroup Forum (Search for Journal in Brave)
Full work available at URL: https://eudml.org/doc/134200
Combinatorial aspects of matrices (incidence, Hadamard, etc.) (05B20) Free semigroups, generators and relations, word problems (20M05) Structure theory of algebraic structures (08A05) Directed graphs (digraphs), tournaments (05C20) Other classical set theory (including functions, relations, and set algebra) (03E20) Semigroups (20M99)
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