The bicyclic semigroup has \(P_ 4^*\)
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Publication:2367903
DOI10.1007/BF02573751zbMath0793.20055OpenAlexW2072221966MaRDI QIDQ2367903
Peter Vachuska, Colleen A. Vachuska
Publication date: 17 August 1993
Published in: Semigroup Forum (Search for Journal in Brave)
Full work available at URL: https://eudml.org/doc/135264
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