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20Mxx Semigroups (9 articles)

• Abrhan, Imrich: О минимальных множествах образующих в унарных алгебрах. (Russian) [Minimal Sets of Generators in Unary Algebras]. Matematický časopis, vol. 25 (1975), issue 4, pp. 305-317
• Münzová-Demlová, Marie: Transformations determining uniquely a monoid. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 11 (1970), issue 4, pp. 595-618
• Sichler, Jiří: ${\frak A} (1,1)$ can be strongly embedded into category of semigroups. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 9 (1968), issue 2, pp. 257-262
• Trnková, Věra: Strong embedding of category of all groupoids into category of semigroups. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 9 (1968), issue 2, pp. 251-256
• Drbohlav, Karel: Concerning congruence relations on commutative semigroups (Preliminary communication). (English). Commentationes Mathematicae Universitatis Carolinae, vol. 4 (1963), issue 1, pp. 11-13
• Hedrlín, Zdeněk: On a number of commuting transformations. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 4 (1963), issue 3, pp. 132-136
• Drbohlav, Karel: On finitely generated commutative semigroups. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 4 (1963), issue 3, pp. 87-92
• Baayen, Cor P.; Hedrlín, Zdeněk: On the product and sum of a system of transformation semigroups. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 4 (1963), issue 1, pp. 29-42
• Hedrlín, Zdeněk: Remark on partial mappings. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 4 (1963), issue 3, pp. 93-97