20 Group theory and generalizations
20Nxx Other generalizations of groups (
3 articles)
20N02 Sets with a single binary operation (groupoids) (59 articles)
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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
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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
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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
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Braitt, Milton; Hobby, David; Silberger, Donald:
Completely dissociative groupoids.
(English).
Mathematica Bohemica,
vol. 137
(2012),
issue 1,
pp. 79-97
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Ježek, Jaroslav:
Definability for equational theories of commutative groupoids.
(English).
Czechoslovak Mathematical Journal,
vol. 62
(2012),
issue 2,
pp. 305-333
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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
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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
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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
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Stanovský, David:
Distributive groupoids are symmetric-by-medial: An elementary proof.
(English).
Commentationes Mathematicae Universitatis Carolinae,
vol. 49
(2008),
issue 4,
pp. 541-546
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Kravchenko, A. V.:
On the lattices of quasivarieties of differential groupoids.
(English).
Commentationes Mathematicae Universitatis Carolinae,
vol. 49
(2008),
issue 1,
pp. 11-17
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Ormes, Nicholas; Vojtěchovský, Petr:
Powers and alternative laws.
(English).
Commentationes Mathematicae Universitatis Carolinae,
vol. 48
(2007),
issue 1,
pp. 25-40
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Ježek, J.:
Slim groupoids.
(English).
Czechoslovak Mathematical Journal,
vol. 57
(2007),
issue 4,
pp. 1275-1288
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Ježek, J.:
Varieties of idempotent slim groupoids.
(English).
Czechoslovak Mathematical Journal,
vol. 57
(2007),
issue 4,
pp. 1289-1309
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Jakubíková-Studenovská, Danica:
Retracts of monounary algebras corresponding to groupoids.
(English).
Mathematica Slovaca,
vol. 56
(2006),
issue 1,
pp. 105-112
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Nebeský, Ladislav:
Travel groupoids.
(English).
Czechoslovak Mathematical Journal,
vol. 56
(2006),
issue 2,
pp. 659-675
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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
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Jedlička, Přemysl:
On left distributive left idempotent groupoids.
(English).
Commentationes Mathematicae Universitatis Carolinae,
vol. 46
(2005),
issue 1,
pp. 15-20
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Cho, Jung R.; Kepka, Tomáš:
Infinite simple zeropotent paramedial groupoids.
(English).
Czechoslovak Mathematical Journal,
vol. 53
(2003),
issue 4,
pp. 769-775
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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
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Cho, Jung R.; Kepka, Tomáš:
Finite simple zeropotent paramedial groupoids.
(English).
Czechoslovak Mathematical Journal,
vol. 52
(2002),
issue 1,
pp. 41-53
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Nebeský, Ladislav:
New proof of a characterization of geodetic graphs.
(English).
Czechoslovak Mathematical Journal,
vol. 52
(2002),
issue 1,
pp. 33-39
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Ježek, J.:
Termal groupoids.
(English).
Czechoslovak Mathematical Journal,
vol. 52
(2002),
issue 4,
pp. 705-716
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Stanovský, David:
Homomorphic images of subdirectly irreducible groupoids.
(English).
Commentationes Mathematicae Universitatis Carolinae,
vol. 42
(2001),
issue 3,
pp. 443-450
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Kepka, Tomáš:
Quasigroups of fractions.
(English).
Acta Universitatis Carolinae. Mathematica et Physica,
vol. 42
(2001),
issue 1,
pp. 3-81
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Ježek, Jaroslav; Kepka, Tomáš:
The equational theory of paramedial cancellation groupoids.
(English).
Czechoslovak Mathematical Journal,
vol. 50
(2000),
issue 1,
pp. 25-34
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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
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Nebeský, Ladislav:
A tree as a finite nonempty set with a binary operation.
(English).
Mathematica Bohemica,
vol. 125
(2000),
issue 4,
pp. 455-458
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Cho, Jung R.; Ježek, Jaroslav; Kepka, Tomáš:
Paramedial groupoids.
(English).
Czechoslovak Mathematical Journal,
vol. 49
(1999),
issue 2,
pp. 277-290
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Cho, Jung R.; Ježek, Jaroslav; Kepka, Tomáš:
Simple paramedial groupoids.
(English).
Czechoslovak Mathematical Journal,
vol. 49
(1999),
issue 2,
pp. 391-399
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Nebeský, Ladislav:
An algebraic characterization of geodetic graphs.
(English).
Czechoslovak Mathematical Journal,
vol. 48
(1998),
issue 4,
pp. 701-710
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Dudek, Józef:
Small idempotent clones. I.
(English).
Czechoslovak Mathematical Journal,
vol. 48
(1998),
issue 1,
pp. 105-118
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Ježek, Jaroslav:
Enumerating left distributive groupoids.
(English).
Czechoslovak Mathematical Journal,
vol. 47
(1997),
issue 4,
pp. 717-727
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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
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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
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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
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Dehornoy, Patrick:
Multiple left distributive systems.
(English).
Commentationes Mathematicae Universitatis Carolinae,
vol. 38
(1997),
issue 4,
pp. 615-625
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Ježek, Jaroslav; Kepka, Tomáš:
Selfdistributive groupoids of small orders.
(English).
Czechoslovak Mathematical Journal,
vol. 47
(1997),
issue 3,
pp. 463-468
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Chajda, Ivan:
Congruence semimodularity of conservative groupoids.
(English).
Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica,
vol. 35
(1996),
issue 1,
pp. 43-45
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Novotný, Miroslav:
Construction of all homomorphisms of groupoids.
(English).
Czechoslovak Mathematical Journal,
vol. 46
(1996),
issue 1,
pp. 141-153
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Sesboüé, André:
Finite monogenic distributive systems.
(English).
Czechoslovak Mathematical Journal,
vol. 46
(1996),
issue 4,
pp. 697-719
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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
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Kepka, Tomáš; Němec, Petr:
Simple balanced groupoids.
(English).
Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica,
vol. 35
(1996),
issue 1,
pp. 53-60
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Dehornoy, Patrick:
An associative operation on monogenic left distributive systems.
(English).
Commentationes Mathematicae Universitatis Carolinae,
vol. 36
(1995),
issue 1,
pp. 1-6
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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
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Kepka, Tomáš:
Ideals in selfdistributive groupoids.
(English).
Commentationes Mathematicae Universitatis Carolinae,
vol. 35
(1994),
issue 1,
pp. 187-191
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Kepka, Tomáš:
Non-idempotent left symmetric left distributive groupoids.
(English).
Commentationes Mathematicae Universitatis Carolinae,
vol. 35
(1994),
issue 1,
pp. 181-186
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El Bashir, Robert; Drápal, Aleš:
Quasitrivial left distributive groupoids.
(English).
Commentationes Mathematicae Universitatis Carolinae,
vol. 35
(1994),
issue 4,
pp. 597-606
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Zelinka, Bohdan:
Representation of undirected graphs by anticommutative conservative groupoids.
(English).
Mathematica Bohemica,
vol. 119
(1994),
issue 3,
pp. 231-237
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Satko, Ladislav:
The tensor product of groupoids.
(English).
Mathematica Slovaca,
vol. 44
(1994),
issue 2,
pp. 237-244
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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
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Zelinka, Bohdan:
Tolerances on poset algebras.
(English).
Mathematica Bohemica,
vol. 117
(1992),
issue 1,
pp. 93-97
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Radelecki, Sándor:
Compatible tolerances on groupoids.
(English).
Czechoslovak Mathematical Journal,
vol. 41
(1991),
issue 3,
pp. 436-445
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Dudek, Józef:
Medial idempotent groupoids. I.
(English).
Czechoslovak Mathematical Journal,
vol. 41
(1991),
issue 2,
pp. 249-259
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Hansen, Donald Joseph:
Pseudo-complemented distributive groupoids.
(English).
Czechoslovak Mathematical Journal,
vol. 41
(1991),
issue 1,
pp. 141-148
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Novotný, Miroslav:
Ternary structures and groupoids.
(English).
Czechoslovak Mathematical Journal,
vol. 41
(1991),
issue 1,
pp. 90-98
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Saade, Marshall:
On decompositions of groupoids.
(English).
Časopis pro pěstování matematiky,
vol. 97
(1972),
issue 1,
pp. 50-54
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Saade, Marshall:
On some classes of point algebras.
(English).
Commentationes Mathematicae Universitatis Carolinae,
vol. 12
(1971),
issue 1,
pp. 33-36