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08B10 Congruence modularity, congruence distributivity (48 articles)

• Chajda, Ivan; Ledda, Antonio; Paoli, Francesco: Compatible Idempotent Terms in Universal Algebra. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 53 (2014), issue 2, pp. 35-51
• Krajník, Filip; Ploščica, Miroslav: Congruence lattices in varieties with compact intersection property. (English). Czechoslovak Mathematical Journal, vol. 64 (2014), issue 1, pp. 115-132
• Chajda, Ivan; Kolařík, Miroslav; Švrček, Filip: Properties of relatively pseudocomplemented directoids. (English). Mathematica Bohemica, vol. 136 (2011), issue 1, pp. 9-23
• Chajda, Ivan: Relatively pseudocomplemented directoids. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 50 (2009), issue 3, pp. 349-357
• Chajda, Ivan; Halaš, Radomír: Varieties satisfying the triangular scheme need not be congruence distributive. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 46 (2007), issue 1, pp. 19-24
• Walendziak, Andrzej: Subalgebras and homomorphic images of algebras having the CEP and the WCIP. (English). Czechoslovak Mathematical Journal, vol. 54 (2004), issue 1, pp. 155-160
• Chajda, Ivan; Zedník, Josef: Distributivity and modularity of lattices of quasiorders. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 42 (2003), issue 1, pp. 13-18
• Chajda, Ivan: Lattices and semilattices having an antitone involution in every upper interval. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 44 (2003), issue 4, pp. 577-585
• Chajda, Ivan; Czédli, Gábor; Horváth, Eszter K.: Trapezoid lemma and congruence distributivity. (English). Mathematica Slovaca, vol. 53 (2003), issue 3, pp. 247-253
• Czédli, Gábor; Horváth, Eszter K.: Congruence distributivity and modularity permit tolerances. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 41 (2002), issue 1, pp. 39-42
• Chajda, I.: Distributivity of lattices of binary relations. (English). Mathematica Bohemica, vol. 127 (2002), issue 3, pp. 449-452
• Czédli, Gábor; Horváth, Eszter K.: Reflexive relations and Mal'tsev conditions for congruence lattice identities in modular varieties. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 41 (2002), issue 1, pp. 43-53
• Chajda, Ivan: Semiregularity of congruences implies congruence modularity at 0. (English). Czechoslovak Mathematical Journal, vol. 52 (2002), issue 2, pp. 333-336
• Chajda, Ivan; Graczyńska, Ewa: Algebras presented by normal identities. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 38 (1999), issue 1, pp. 49-58
• Chajda, Ivan: Algebras satisfying certain quasiorder identities. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 38 (1999), issue 1, pp. 35-41
• Chajda, Ivan: Jónsson's lemma for normally presented varieties. (English). Mathematica Bohemica, vol. 122 (1997), issue 4, pp. 381-382
• Duda, Jaromír: Announcements of new results. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 37 (1996), issue 3, pp. 657
• Chajda, Ivan: Congruence semimodularity of conservative groupoids. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 35 (1996), issue 1, pp. 43-45
• Vaggione, Diego: On Jónsson's theorem. (English). Mathematica Bohemica, vol. 121 (1996), issue 1, pp. 55-58
• Czédli, Gábor: Diamond identities for relative congruences. (English). Archivum Mathematicum, vol. 31 (1995), issue 1, pp. 65-74
• Chajda, Ivan: A characterization of arithmetical varieties by two-element subsets. (English). Czechoslovak Mathematical Journal, vol. 44 (1994), issue 3, pp. 521-522
• Walendziak, Andrzej: Full subdirect and weak direct products of algebras. (English). Mathematica Slovaca, vol. 44 (1994), issue 1, pp. 45-54
• Chajda, I.; Kotrle, M.: Subdirectly irreducible and congruence distributive $q$-lattices. (English). Czechoslovak Mathematical Journal, vol. 43 (1993), issue 4, pp. 635-642
• Jordens, Olav: On modularity in lattices of congruences on ordered sets. (English). Czechoslovak Mathematical Journal, vol. 42 (1992), issue 3, pp. 451-460
• Chajda, Ivan: Varieties with modular and distributive lattices of symmetric or reflexive relations. (English). Czechoslovak Mathematical Journal, vol. 42 (1992), issue 4, pp. 623-630
• Czédli, Gábor: Notes on congruence implication. (English). Archivum Mathematicum, vol. 27 (1991), issue 2, pp. 149-153
• Pondělíček, Bedřich: On permutability in semigroup varieties. (English). Mathematica Bohemica, vol. 116 (1991), issue 4, pp. 396-400
• Chajda, Ivan: Varieties having distributive lattices of quasiorders. (English). Czechoslovak Mathematical Journal, vol. 41 (1991), issue 1, pp. 85-89
• Pondělíček, Bedřich: Tolerance modular varieties of semigroups. (English). Czechoslovak Mathematical Journal, vol. 40 (1990), issue 3, pp. 441-452
• Chajda, Ivan; Duda, Jaromír: Varieties satisfying ideal equalities. (English). Mathematica Slovaca, vol. 39 (1989), issue 1, pp. 55-63
• Chajda, Ivan: The egg-box property of congruences. (English). Mathematica Slovaca, vol. 38 (1988), issue 3, pp. 243-247
• Chajda, Ivan: Algebras with principal tolerances. (English). Mathematica Slovaca, vol. 37 (1987), issue 2, pp. 169-172
• Chajda, Ivan; Zelinka, Bohdan: A characterization of tolerance-distributive tree semilattices. (English). Czechoslovak Mathematical Journal, vol. 37 (1987), issue 2, pp. 175-180
• Chajda, Ivan: Congruence distributivity in varieties with constants. (English). Archivum Mathematicum, vol. 22 (1986), issue 3, pp. 121-124
• Chajda, Ivan: Coherence in dual discriminator varieties. (English). Mathematica Slovaca, vol. 35 (1985), issue 2, pp. 155-159
• Pondělíček, Bedřich: Modularity and distributivity of tolerance lattices of commutative inverse semigroups. (English). Czechoslovak Mathematical Journal, vol. 35 (1985), issue 1, pp. 146-157
• Johnston, Katherine: Non-modular congruence lattices of Rees matrix semigroups. (English). Czechoslovak Mathematical Journal, vol. 35 (1985), issue 3, pp. 429-443
• Ramana Murty, P.V.; Raman, V.: Permutability of distributive congruence relations in a joint semilattice directed below. (English). Mathematica Slovaca, vol. 35 (1985), issue 1, pp. 43-49
• Sivák, Bohuslav: The structure of the rings assigned to group varieties. (English). Mathematica Slovaca, vol. 35 (1985), issue 2, pp. 169-173
• Chajda, Ivan: Varieties with tolerance and congruence extension property. (English). Archivum Mathematicum, vol. 21 (1985), issue 1, pp. 5-12
• Ursini, Aldo: Prime ideals in universal algebras. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 25 (1984), issue 1, pp. 75-87
• Chajda, Ivan: Regularity in arithmetical varieties. (English). Archivum Mathematicum, vol. 20 (1984), issue 4, pp. 177-182
• Zlatoš, Pavol: On the ring of the variety of algebras over a ring. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 24 (1983), issue 2, pp. 325-334
• Chajda, Ivan: Direct decomposability of congruences in congruence-permutable varieties. (English). Mathematica Slovaca, vol. 32 (1982), issue 1, pp. 93-96
• Draškovičová, Hilda: Modular median algebras. (English). Mathematica Slovaca, vol. 32 (1982), issue 3, pp. 269-281
• Korec, Ivan: Concrete representation of some equivalence lattices. (English). Mathematica Slovaca, vol. 31 (1981), issue 1, pp. 13-22
• Cornish, William H.: A ternary variety generated by lattices. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 22 (1981), issue 4, pp. 773-784
• Chajda, Ivan: A characterization of distributive lattices by tolerance lattices. (English). Archivum Mathematicum, vol. 15 (1979), issue 4, pp. 203-204