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20N02 Sets with a single binary operation (groupoids) (59 articles)

• Gran, Marino; Janelidze, George; Sobral, Manuela: Split extensions and semidirect products of unitary magmas. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 60 (2019), issue 4, pp. 509-527
• Braitt, Milton; Hobby, David; Silberger, Donald: Antiassociative groupoids. (English). Mathematica Bohemica, vol. 142 (2017), issue 1, pp. 27-46
• Matczak, K.; Romanowska, A. B.: Some regular quasivarieties of commutative binary modes. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 55 (2014), issue 4, pp. 471-484
• Cho, Jung Rae; Park, Jeongmi; Sano, Yoshio: Travel groupoids on infinite graphs. (English). Czechoslovak Mathematical Journal, vol. 64 (2014), issue 3, pp. 763-766
• Chajda, Ivan; Länger, Helmut: Groupoids assigned to relational systems. (English). Mathematica Bohemica, vol. 138 (2013), issue 1, pp. 15-23
• Braitt, Milton; Hobby, David; Silberger, Donald: Completely dissociative groupoids. (English). Mathematica Bohemica, vol. 137 (2012), issue 1, pp. 79-97
• Ježek, Jaroslav: Definability for equational theories of commutative groupoids. (English). Czechoslovak Mathematical Journal, vol. 62 (2012), issue 2, pp. 305-333
• Jedlička, Přemysl: On Equational Theory of Left Divisible Left Distributive Groupoids. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 51 (2012), issue 2, pp. 67-72
• Stanovský, David: Selfdistributive grupoids, Part A2: Non-idempotent left distributive quasigroups. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 52 (2011), issue 2, pp. 7-28
• Chajda, Ivan; Länger, Helmut: Quotients and homomorphisms of relational systems. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 49 (2010), issue 2, pp. 37-47
• Stanovský, David: Distributive groupoids are symmetric-by-medial: An elementary proof. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 49 (2008), issue 4, pp. 541-546
• Kravchenko, A. V.: On the lattices of quasivarieties of differential groupoids. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 49 (2008), issue 1, pp. 11-17
• Ormes, Nicholas; Vojtěchovský, Petr: Powers and alternative laws. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 48 (2007), issue 1, pp. 25-40
• Ježek, J.: Slim groupoids. (English). Czechoslovak Mathematical Journal, vol. 57 (2007), issue 4, pp. 1275-1288
• Ježek, J.: Varieties of idempotent slim groupoids. (English). Czechoslovak Mathematical Journal, vol. 57 (2007), issue 4, pp. 1289-1309
• Jakubíková-Studenovská, Danica: Retracts of monounary algebras corresponding to groupoids. (English). Mathematica Slovaca, vol. 56 (2006), issue 1, pp. 105-112
• Nebeský, Ladislav: Travel groupoids. (English). Czechoslovak Mathematical Journal, vol. 56 (2006), issue 2, pp. 659-675
• Chajda, Ivan: A groupoid characterization of orthomodular lattices. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 44 (2005), issue 1, pp. 13-18
• Jedlička, Přemysl: On left distributive left idempotent groupoids. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 46 (2005), issue 1, pp. 15-20
• Cho, Jung R.; Kepka, Tomáš: Infinite simple zeropotent paramedial groupoids. (English). Czechoslovak Mathematical Journal, vol. 53 (2003), issue 4, pp. 769-775
• Kepka, Tomáš; Němec, Petr: Selfdistributive groupoids. Part A1. Non-indempotent left distributive groupoids. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 44 (2003), issue 1, pp. 3-94
• Cho, Jung R.; Kepka, Tomáš: Finite simple zeropotent paramedial groupoids. (English). Czechoslovak Mathematical Journal, vol. 52 (2002), issue 1, pp. 41-53
• Nebeský, Ladislav: New proof of a characterization of geodetic graphs. (English). Czechoslovak Mathematical Journal, vol. 52 (2002), issue 1, pp. 33-39
• Ježek, J.: Termal groupoids. (English). Czechoslovak Mathematical Journal, vol. 52 (2002), issue 4, pp. 705-716
• Stanovský, David: Homomorphic images of subdirectly irreducible groupoids. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 42 (2001), issue 3, pp. 443-450
• Kepka, Tomáš: Quasigroups of fractions. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 42 (2001), issue 1, pp. 3-81
• Ježek, Jaroslav; Kepka, Tomáš: The equational theory of paramedial cancellation groupoids. (English). Czechoslovak Mathematical Journal, vol. 50 (2000), issue 1, pp. 25-34
• Bashir, Robert El; Ježek, Jaroslav; Kepka, Tomáš: Simple zeropotent paramedial groupoids are balanced. (English). Czechoslovak Mathematical Journal, vol. 50 (2000), issue 2, pp. 397-399
• Nebeský, Ladislav: A tree as a finite nonempty set with a binary operation. (English). Mathematica Bohemica, vol. 125 (2000), issue 4, pp. 455-458
• Cho, Jung R.; Ježek, Jaroslav; Kepka, Tomáš: Paramedial groupoids. (English). Czechoslovak Mathematical Journal, vol. 49 (1999), issue 2, pp. 277-290
• Cho, Jung R.; Ježek, Jaroslav; Kepka, Tomáš: Simple paramedial groupoids. (English). Czechoslovak Mathematical Journal, vol. 49 (1999), issue 2, pp. 391-399
• Nebeský, Ladislav: An algebraic characterization of geodetic graphs. (English). Czechoslovak Mathematical Journal, vol. 48 (1998), issue 4, pp. 701-710
• Dudek, Józef: Small idempotent clones. I. (English). Czechoslovak Mathematical Journal, vol. 48 (1998), issue 1, pp. 105-118
• Ježek, Jaroslav: Enumerating left distributive groupoids. (English). Czechoslovak Mathematical Journal, vol. 47 (1997), issue 4, pp. 717-727
• Drápal, A.; Ježek, J.; Kepka, T.: Groupoids and the associative law IX. (Associative triples in some classes of groupoids). (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 38 (1997), issue 1, pp. 39-52
• Kepka, T.; Trch, M.: Groupoids and the associative law VI. (Szász-Hájek groupoids of type (a, b, c)). (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 38 (1997), issue 1, pp. 13-22
• Drápal, A.; Kepka, T.: Groupoids and the associative law VIII. (Diagonally Non-Associative Groupoids). (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 38 (1997), issue 1, pp. 23-37
• Dehornoy, Patrick: Multiple left distributive systems. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 38 (1997), issue 4, pp. 615-625
• Ježek, Jaroslav; Kepka, Tomáš: Selfdistributive groupoids of small orders. (English). Czechoslovak Mathematical Journal, vol. 47 (1997), issue 3, pp. 463-468
• Chajda, Ivan: Congruence semimodularity of conservative groupoids. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 35 (1996), issue 1, pp. 43-45
• Novotný, Miroslav: Construction of all homomorphisms of groupoids. (English). Czechoslovak Mathematical Journal, vol. 46 (1996), issue 1, pp. 141-153
• Sesboüé, André: Finite monogenic distributive systems. (English). Czechoslovak Mathematical Journal, vol. 46 (1996), issue 4, pp. 697-719
• Ježek, Jaroslav; Kepka, Tomáš: Groupoids and the associative law XII. (Representable cardinal functions). (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 37 (1996), issue 1, pp. 41-62
• Kepka, Tomáš; Němec, Petr: Simple balanced groupoids. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 35 (1996), issue 1, pp. 53-60
• Dehornoy, Patrick: An associative operation on monogenic left distributive systems. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 36 (1995), issue 1, pp. 1-6
• Drápal, Aleš; Kepka, Tomáš; Musílek, Michal: Group conjugation has non-trivial LD-identities. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 35 (1994), issue 2, pp. 219-222
• Kepka, Tomáš: Ideals in selfdistributive groupoids. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 35 (1994), issue 1, pp. 187-191
• Kepka, Tomáš: Non-idempotent left symmetric left distributive groupoids. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 35 (1994), issue 1, pp. 181-186
• El Bashir, Robert; Drápal, Aleš: Quasitrivial left distributive groupoids. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 35 (1994), issue 4, pp. 597-606
• Zelinka, Bohdan: Representation of undirected graphs by anticommutative conservative groupoids. (English). Mathematica Bohemica, vol. 119 (1994), issue 3, pp. 231-237
• Satko, Ladislav: The tensor product of groupoids. (English). Mathematica Slovaca, vol. 44 (1994), issue 2, pp. 237-244
• Drápal, Aleš: On a class of commutative groupoids determined by their associativity triples. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 34 (1993), issue 2, pp. 199-201
• Zelinka, Bohdan: Tolerances on poset algebras. (English). Mathematica Bohemica, vol. 117 (1992), issue 1, pp. 93-97
• Radelecki, Sándor: Compatible tolerances on groupoids. (English). Czechoslovak Mathematical Journal, vol. 41 (1991), issue 3, pp. 436-445
• Dudek, Józef: Medial idempotent groupoids. I. (English). Czechoslovak Mathematical Journal, vol. 41 (1991), issue 2, pp. 249-259
• Hansen, Donald Joseph: Pseudo-complemented distributive groupoids. (English). Czechoslovak Mathematical Journal, vol. 41 (1991), issue 1, pp. 141-148
• Novotný, Miroslav: Ternary structures and groupoids. (English). Czechoslovak Mathematical Journal, vol. 41 (1991), issue 1, pp. 90-98
• Saade, Marshall: On decompositions of groupoids. (English). Časopis pro pěstování matematiky, vol. 97 (1972), issue 1, pp. 50-54
• Saade, Marshall: On some classes of point algebras. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 12 (1971), issue 1, pp. 33-36