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Author: Kepka, Tomáš

• Kepka, Tomáš; Němec, Petr: Quasitrivial semimodules. IV. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 54 (2013), issue 1, pp. 3-22
• Kepka, Tomáš; Němec, Petr: Quasitrivial semimodules. V. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 54 (2013), issue 1, pp. 23-35
• Kepka, Tomáš; Němec, Petr: Quasitrivial semimodules. VI. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 54 (2013), issue 1, pp. 45-61
• Kepka, Tomáš; Němec, Petr: Quasitrivial semimodules. VII. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 54 (2013), issue 1, pp. 63-78
• Kepka, Tomáš; Němec, Petr: Ideal-simple semirings. I. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 53 (2012), issue 2, pp. 5-16
• Kepka, Tomáš; Němec, Petr: Ideal-simple semirings. II. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 53 (2012), issue 2, pp. 17-29
• Kepka, Tomáš; Němec, Petr: Ideal-simple semirings. III. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 53 (2012), issue 2, pp. 31-46
• Kepka, Tomáš; Němec, Petr: In memory of Jaroslav Ježek. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 53 (2012), issue 2, pp. 3-4
• Kepka, Tomáš; Němec, Petr: (Pre)order preserving additive homomorphisms of (pre)ordered commutative semigroups into real numbers. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 53 (2012), issue 1, pp. 3-32
• Gagola, Stephen III,; Kepka, Tomáš: Transitive closures of binary relations. IV. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 53 (2012), issue 2, pp. 47-60
• Ježek, Jaroslav; Kepka, Tomáš; Němec, Petr: Commutative semigroups that are simple over thein endomorphism semirings. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 52 (2011), issue 2, pp. 37-50
• Ježek, Jaroslav; Kepka, Tomáš; Němec, Petr: Commutative semigroups with almost transitive endomorphism semirings. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 52 (2011), issue 2, pp. 29-32
• El Bashir, Robert; Kepka, Tomáš; Žemlička, Jan: Dually steady rings. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 52 (2011), issue 2, pp. 89-95
• Flaška, Václav; Kepka, Tomáš; Korteleinen, Juha: On separating sets of words. V. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 52 (2011), issue 2, pp. 51-59
• Ježek, Jaroslav; Kepka, Tomáš; Němec, Petr: One element extensions of commutative semigroups. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 52 (2011), issue 2, pp. 33-35
• Kala, Vítězslav; Kepka, Tomáš: Commutative parasemifields finitely generated as semirings. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 51 (2010), issue 1, pp. 49-56
• Ježek, Jaroslav; Kepka, Tomáš: Finitely generated commutative division semirings. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 51 (2010), issue 1, pp. 3-27
• Kala, Vítězslav; Kepka, Tomáš; Němec, Petr: Norms on semirings. I. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 51 (2010), issue 1, pp. 29-48
• Flaška, Václav; Kepka, Tomáš; Kortelainen, Juha: On separating sets of words. III. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 51 (2010), issue 1, pp. 57-64
• Flaška, Václav; Kepka, Tomáš; Kortelainen, Juha: On separating sets of words. IV. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 51 (2010), issue 1, pp. 65-71
• Flaška, Václav; Kepka, Tomáš; Kortelainen, Juha: On separating sets of words. II. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 50 (2009), issue 1, pp. 15-28
• Al-Zoubi, Khaldoun; Kepka, Tomáš; Němec, Petr: Quasitrivial semimodules. III. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 50 (2009), issue 1, pp. 3-13
• Kepka, Tomáš; Korbelář, Miroslav: Various examples of parasemifields. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 50 (2009), issue 1, pp. 61-72
• Kala, V.; Kepka, Tomáš; Phillips, J. D.: Various subsemirings of the field $\Bbb Q$ of rational numbers. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 50 (2009), issue 1, pp. 29-59
• Kepka, Tomáš; Němec, Petr: Commutative radical rings. II. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 49 (2008), issue 1, pp. 53-73
• Flaška, Václav; Kepka, Tomáš; Kortelainen, Juha: On separating sets of words. I. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 49 (2008), issue 1, pp. 33-51
• Al-Zoubi, Khaldoun; Kepka, Tomáš; Němec, Petr: Quasitrivial semimodules. I. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 49 (2008), issue 1, pp. 3-16
• Al-Zoubi, Khaldoun; Kepka, Tomáš; Němec, Petr: Quasitrivial semimodules. II. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 49 (2008), issue 1, pp. 17-24
• Flaška, Václav; Ježek, Jaroslav; Kepka, Tomáš: Transitive closures of binary relations. III. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 49 (2008), issue 1, pp. 25-31
• Kepka, Tomáš; Němec, Petr: Commutative radical rings. I. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 48 (2007), issue 1, pp. 11-41
• Flaška, Václav; Ježek, Jaroslav; Kepka, Tomáš: Transitive closures of binary relations II. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 48 (2007), issue 1, pp. 71-80
• Flaška, Václav; Ježek, Jaroslav; Kepka, Tomáš; Kortelainen, Juha: Transitive closures of binary relations. I. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 48 (2007), issue 1, pp. 55-69
• Flaška, Václav; Jančařík, Antonín; Kala, Vítězslav; Kepka, Tomáš: Trees in commtative nil-semigroups of index two. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 48 (2007), issue 1, pp. 81-101
• Flaška, Václav; Kepka, Tomáš: Commutative zeropotent semigroups. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 47 (2006), issue 1, pp. 3-14
• Ježek, Jaroslav; Kepka, Tomáš: Selfdistributive groupoids. Part D1: Left distributive semigroups. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 47 (2006), issue 1, pp. 15-56
• Bashir, Robert El; Kepka, Tomáš; Kechlibar, Marian: Commutative semigroups with few fully invariant congruences I. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 46 (2005), issue 1, pp. 49-64
• Bashir, Robert El; Kepka, Tomáš; Kechlibar, Marian: Commutative semigroups with few fully invariant congruences II. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 46 (2005), issue 1, pp. 65-75
• Jančařík, Antonín; Kepka, Tomáš; Vítek, Milan: Multiplication groups of quasigroups and loops IV. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 46 (2005), issue 1, pp. 77-100
• Kechlibar, Marian; Kepka, Tomáš; Kortelainen, Juha: A note on finitely generated commutative rings. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 46 (2005), issue 1, pp. 101-105
• Kepka, Tomáš; Příhoda, Pavel; Šťovíček, Jan: Unions of subquasigroups. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 45 (2004), issue 1, pp. 43-54
• 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
• Kepka, Tomáš: Quasigroups of fractions. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 42 (2001), issue 1, pp. 3-81
• Ježek, Jaroslav; Kepka, Tomáš: Bijective reflexions and coreflexions of commutative unars. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 37 (1996), issue 1, pp. 31-40
• 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; Trch, Milan: Groupoids and the associative law III. (Szász-Hájek groupoids). (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 36 (1995), issue 1, pp. 17-30
• Kepka, Tomáš; Trch, Milan: Groupoids and the associative law V. (Szász-Hájek groupoids fo type (A, A, B)). (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 36 (1995), issue 1, pp. 31-44
• Kepka, Tomáš; Trch, Milan: Groupoids and the associative law IV. (Szász-Hájek Groupoids of Type (A, B, A)). (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 35 (1994), issue 1, pp. 31-42
• Drápal, Aleš; Kepka, Tomáš; Maršálek, Petr: Multiplication groups of quasigroups and loops II. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 35 (1994), issue 1, pp. 9-29
• Kepka, Tomáš; Trch, Milan: Groupoids and the associative law II. (Groupoids with small semigroup distance). (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 34 (1993), issue 1, pp. 67-83
• Drápal, Aleš; Kepka, Tomáš: Multiplication groups of quasigroups and loops I. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 34 (1993), issue 1, pp. 85-99
• Kepka, Tomáš; Trch, Milan: Groupoids and the associative law I. (Associative triples). (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 33 (1992), issue 1, pp. 69-86
• Ježek, Jaroslav; Kepka, Tomáš: Notes on the number of associative triples. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 31 (1990), issue 1, pp. 15-19
• Kepka, Tomáš; Němec, Petr: Trimedial quasigroups and generalized modules I. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 31 (1990), issue 1, pp. 3-14
• Kepka, Tomáš: A note on subdirectly irreducible groupoids. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 22 (1981), issue 1, pp. 25-28
• Kepka, Tomáš: Notes on associative triples of elements in commutative groupoids. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 22 (1981), issue 2, pp. 39-47
• Kepka, Tomáš: Notes on left distributive groupoids. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 22 (1981), issue 2, pp. 23-37
• Kepka, Tomáš: On a class of groupoids. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 22 (1981), issue 1, pp. 29-49
• Kepka, Tomáš: On a class of subdirectly irreducible groupoids. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 22 (1981), issue 1, pp. 17-24
• Kepka, Tomáš: Quasitrivial groupoids and balanced identities. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 22 (1981), issue 2, pp. 49-64
• Kepka, Tomáš: Medial division groupoids. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 20 (1979), issue 1, pp. 41-60
• Kepka, Tomáš; Němec, P.: Quasigroups whose regular mappings are automorphisms. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 20 (1979), issue 1, pp. 61-71
• Ježek, J.; Kepka, Tomáš; Němec, P.: The category of totally symmetric quasigroups is binding. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 19 (1978), issue 2, pp. 63-64
• Kepka, Tomáš: Commutative distributive groupoids. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 19 (1978), issue 2, pp. 45-58
• Kepka, Tomáš: A note on simple quasigroups. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 19 (1978), issue 2, pp. 59-60
• Kepka, Tomáš: A note on WA-quasigroups. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 19 (1978), issue 2, pp. 61-62
• Ježek, J.; Kepka, Tomáš: Quasetrivial and nearly quasitrivial distributive goupoids and semigroups. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 19 (1978), issue 2, pp. 25-44
• Kepka, Tomáš; Němec, P.: Unipotent quasigroups. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 18 (1977), issue 2, pp. 13-22
• Ježek, J.; Kepka, Tomáš: Free commutative idempotent abelian groupoids and quasigroups. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 17 (1976), issue 2, pp. 13-19
• Ježek, J.; Kepka, Tomáš: Extensive varieties. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 16 (1975), issue 2, pp. 79-87
• Kepka, Tomáš: $\Lambda$, $R$-transitive groupoids. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 16 (1975), issue 2, pp. 71-77
• Kepka, Tomáš: Normal congruence relations on division groupoids. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 16 (1975), issue 2, pp. 89-95
• Bican, L.; Jambor, P.; Kepka, Tomáš; Němec, P.: Stable and costable preradicals. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 16 (1975), issue 2, pp. 63-69
• Kepka, Tomáš: Regular mappings of groupoids. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 12 (1971), issue 1, pp. 25-37
• Němec, P.; Kepka, Tomáš: T-quasigroups (Part I.). (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 12 (1971), issue 1, pp. 39-49
• Kepka, Tomáš; Němec, P.: T-quasigroups (Part II.). (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 12 (1971), issue 2, pp. 31-49