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Author: Ježek, Jaroslav

• Ježek, Jaroslav: Definability for equational theories of commutative groupoids. (English). Czechoslovak Mathematical Journal, vol. 62 (2012), issue 2, pp. 305-333
• 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
• 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
• Ježek, Jaroslav; Kepka, Tomáš: Finitely generated commutative division semirings. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 51 (2010), issue 1, pp. 3-27
• Ježek, Jaroslav; Kepka, Tomáš: The semiring of 1-preserving endomorphisms of a semilattice. (English). Czechoslovak Mathematical Journal, vol. 59 (2009), issue 4, pp. 999-1003
• Ježek, Jaroslav; Kepka, Tomáš; Němec, Petr: Commutative semigroups that are nil of index 2 and have no irreducible elements. (English). Mathematica Bohemica, vol. 133 (2008), issue 1, pp. 1-7
• 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
• 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
• 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
• Ježek, Jaroslav; Slavík, Václav: Congruence lattices of finite chains with endomorphisms. (English). Mathematica Bohemica, vol. 126 (2001), issue 4, pp. 737-744
• Ježek, Jaroslav; Kepka, Tomáš: The equational theory of paramedial cancellation groupoids. (English). Czechoslovak Mathematical Journal, vol. 50 (2000), issue 1, pp. 25-34
• Ježek, Jaroslav; Slavík, Václav: Incomparably continuable sets of semilattices. (English). Mathematica Bohemica, vol. 125 (2000), issue 2, pp. 135-137
• Ježek, Jaroslav; Slavík, Václav: Random posets, lattices, and lattices terms. (English). Mathematica Bohemica, vol. 125 (2000), issue 2, pp. 129-133
• 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
• 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
• Ježek, Jaroslav: Some decidable congruences of free monoids. (English). Czechoslovak Mathematical Journal, vol. 49 (1999), issue 3, pp. 475-480
• Ježek, Jaroslav: Enumerating left distributive groupoids. (English). Czechoslovak Mathematical Journal, vol. 47 (1997), issue 4, pp. 717-727
• Ježek, Jaroslav; Kepka, Tomáš: Selfdistributive groupoids of small orders. (English). Czechoslovak Mathematical Journal, vol. 47 (1997), issue 3, pp. 463-468
• 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
• Ježek, Jaroslav: A note on finite sets of terms closed under subterms and unification. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 37 (1996), issue 3, pp. 655-656
• 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
• Ježek, Jaroslav; Newrly, Norbert; Tůma, Jiří: Remarks on equational theories of semilattices with operators. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 31 (1990), issue 3, pp. 415-425
• Ježek, Jaroslav; Slavík, Václav: Free lattices over halflattices. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 30 (1989), issue 2, pp. 203-211
• Ježek, Jaroslav; Kepka, Tomáš: Varieties of groupoids determined by short linear identities. (English). Czechoslovak Mathematical Journal, vol. 39 (1989), issue 4, pp. 644-658
• Ježek, Jaroslav: Minimal bounded varieties. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 29 (1988), issue 2, pp. 261-265
• Ježek, Jaroslav: Equational theories of some almost unary groupoids. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 27 (1986), issue 3, pp. 421-433
• Ježek, Jaroslav: The lattice of equational theories. Part IV: Equational theories of finite algebras. (English). Czechoslovak Mathematical Journal, vol. 36 (1986), issue 2, pp. 331-341
• Ježek, Jaroslav; Kepka, Tomáš: Modular groupoids. (English). Czechoslovak Mathematical Journal, vol. 34 (1984), issue 3, pp. 477-487
• Ježek, Jaroslav; Kepka, Tomáš: Permutable groupoids. (English). Czechoslovak Mathematical Journal, vol. 34 (1984), issue 3, pp. 396-410
• Ježek, Jaroslav; Kepka, Tomáš: Notes on distributive groupoids. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 24 (1983), issue 2, pp. 237-249
• Ježek, Jaroslav; Kepka, Tomáš: Torsion groupoids. (English). Czechoslovak Mathematical Journal, vol. 33 (1983), issue 1, pp. 7-26
• Ježek, Jaroslav: The lattice of equational theories. Part III: Definability and automorphisms. (English). Czechoslovak Mathematical Journal, vol. 32 (1982), issue 1, pp. 129-164
• Ježek, Jaroslav: A note on isomorphic varieties. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 23 (1982), issue 3, pp. 579-588
• Ježek, Jaroslav: The number of minimal varieties of idempotent groupoids. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 23 (1982), issue 1, pp. 199-205
• Ježek, Jaroslav; Kepka, Tomáš: Free entropic groupoids. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 22 (1981), issue 2, pp. 223-233
• Ježek, Jaroslav: The lattice of equational theories. Part I: Modular elements. (English). Czechoslovak Mathematical Journal, vol. 31 (1981), issue 1, pp. 127-152
• Ježek, Jaroslav: The lattice of equational theories. Part II: The lattice of full sets of terms. (English). Czechoslovak Mathematical Journal, vol. 31 (1981), issue 4, pp. 573-603
• Ježek, Jaroslav; Kepka, Tomáš: Semigroup representations of medial groupoids. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 22 (1981), issue 3, pp. 513-524
• Ježek, Jaroslav; Slavík, Václav: Primitive lattices. (English). Czechoslovak Mathematical Journal, vol. 29 (1979), issue 4, pp. 595-634
• Ježek, Jaroslav: Terms and semiterms. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 20 (1979), issue 3, pp. 447-460
• Ježek, Jaroslav; Kepka, Tomáš: Varieties of quasigroups determined by short strictly balanced identities. (English). Czechoslovak Mathematical Journal, vol. 29 (1979), issue 1, pp. 84-96
• Ježek, Jaroslav; Kepka, Tomáš: Varieties of abelian quasigroups. (English). Czechoslovak Mathematical Journal, vol. 27 (1977), issue 3, pp. 473-503
• Ježek, Jaroslav: Varieties of algebras with equationally definable zeros. (English). Czechoslovak Mathematical Journal, vol. 27 (1977), issue 3, pp. 394-414
• Ježek, Jaroslav: EDZ-varieties: The Schreier property and epimorphisms onto. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 17 (1976), issue 2, pp. 281-290
• Ježek, Jaroslav: Normal subsets of quasigroups. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 16 (1975), issue 1, pp. 77-85
• Ježek, Jaroslav; Kepka, Tomáš: Quasigroups, isotopic to a group. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 16 (1975), issue 1, pp. 59-76
• Ježek, Jaroslav; Kepka, Tomáš: Semigroup representations of commutative idempotent Abelian groupoids. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 16 (1975), issue 3, pp. 487-500
• Ježek, Jaroslav: The existence of upper semicomplements in lattices of primitive classes. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 12 (1971), issue 3, pp. 519-532
• Ježek, Jaroslav: Upper semicomplements and a definable element in the lattice of groupoid varieties. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 12 (1971), issue 3, pp. 565-586
• Ježek, Jaroslav: An embedding of groupoids and monomorphisms into simple groupoids. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 11 (1970), issue 1, pp. 91-98
• Ježek, Jaroslav: On atoms in lattices of primitive classes. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 11 (1970), issue 3, pp. 515-532
• Ježek, Jaroslav: Principal dual ideals in lattices of primitive classes. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 9 (1968), issue 4, pp. 533-545
• Ježek, Jaroslav: Reduced dimension of primitive classes of universal algebras. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 9 (1968), issue 1, pp. 103-108