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54B30 Categorical methods (97 articles)

• Hager, Anthony W.; Wynne, Brian: The category of compactifications and its coreflections. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 63 (2022), issue 3, pp. 365-378
• Kula, Muammer; Özkan, Samed: $T_{2}$ and $T_{3}$ objects at $p$ in the category of proximity spaces. (English). Mathematica Bohemica, vol. 145 (2020), issue 2, pp. 177-190
• Karchevska, L.; Radul, T.: On extension of functors. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 53 (2012), issue 2, pp. 269-279
• Banakh, Taras; Dimitrova, Svetlana: Openly factorizable spaces and compact extensions of topological semigroups. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 51 (2010), issue 1, pp. 113-131
• Townsend, Christopher: A categorical account of the localic closed subgroup theorem. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 48 (2007), issue 3, pp. 541-553
• Frič, Roman: Extension of measures: a categorical approach. (English). Mathematica Bohemica, vol. 130 (2005), issue 4, pp. 397-407
• Sleziak, Martin: Subspaces of pseudoradial spaces. (English). Mathematica Slovaca, vol. 53 (2003), issue 5, pp. 505-514
• Mynard, Frédéric: More on strongly sequential spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 43 (2002), issue 3, pp. 525-530
• Zhuraev, T. F.: On projectively quotient functors. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 42 (2001), issue 3, pp. 561-573
• Frič, Roman; Jakubík, Ján: Sequential convergences on Boolean algebras defined by systems of maximal filters. (English). Czechoslovak Mathematical Journal, vol. 51 (2001), issue 2, pp. 261-274
• Mynard, Frédéric: Strongly sequential spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 41 (2000), issue 1, pp. 143-153
• Zhang, Dexue: Tower extension of topological constructs. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 41 (2000), issue 1, pp. 41-51
• Herrlich, Horst; Hušek, Miroslav: Productivity of coreflective classes of topological groups. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 40 (1999), issue 3, pp. 551-560
• Frič, Roman: Rings of maps: sequential convergence and completion. (English). Czechoslovak Mathematical Journal, vol. 49 (1999), issue 1, pp. 111-118
• Buhagiar, David: The Tamano Theorem in $\Cal MAP$. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 40 (1999), issue 4, pp. 755-770
• Holgate, David: Linking the closure and orthogonality properties of perfect morphisms in a category. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 39 (1998), issue 3, pp. 587-607
• Radul, T.: On the functor of order-preserving functionals. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 39 (1998), issue 3, pp. 609-615
• Tarafdar, E.; Watson, P.; Yuan, Xian-Zhi: Correction to the paper: Random coincidence degree theory with applications to random differential inclusions. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 38 (1997), issue 4, pp. 815-816
• Banakh, T.; Pikhurko, O.: Correction to the paper: On linear functorial operators extending pseudometrics. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 38 (1997), issue 4, pp. 815-815
• Radul, Taras: A functional representation of the hyperspace monad. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 38 (1997), issue 1, pp. 165-168
• Banakh, T.; Pikhurko, O.: On linear functorial operators extending pseudometrics. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 38 (1997), issue 2, pp. 343-348
• Lowen, R.; Windels, B.: On the quantification of uniform properties. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 38 (1997), issue 4, pp. 749-759
• Nykyforchyn, O. R.: Semiconvex compacta. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 38 (1997), issue 4, pp. 761-774
• Banaschewski, B.; Pultr, A.: Booleanization of uniform frames. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 37 (1996), issue 1, pp. 135-146
• Teleiko, A.: On extension of functors to the Kleisli category of some weakly normal monads. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 37 (1996), issue 2, pp. 405-410
• Schroder, Mark: Arrows in the “finite product theorem for certain epireflections'” of R. Frič and D. C. Kent. (English). Mathematica Slovaca, vol. 45 (1995), issue 2, pp. 171-191
• Stegall, C.: Concerning a certain $\sigma$-algebra in compact Hausdorff spaces. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 34 (1993), issue 2, pp. 113-116
• Baran, Mehmet: The notion of closedness in topological categories. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 34 (1993), issue 2, pp. 383-395
• Lowen, R.: Cantor-connectedness revisited. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 33 (1992), issue 3, pp. 525-532
• Brümmer, G. C. L.; Giuli, E.: A categorical concept of completion of objects. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 33 (1992), issue 1, pp. 131-147
• Adámek, Jiří; Reiterman, Jan: The category of uniform spaces as a completion of the category of metric spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 33 (1992), issue 4, pp. 689-693
• Schröder, J.: Natural sinks on $Y_\beta$. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 33 (1992), issue 1, pp. 173-179
• Shteinbuk, Veniamin; Šostak, Alexander: On endomorphism semigroups of a fuzzily structured set. (English). Kybernetika, vol. 28 (1992), issue 7, pp. 54-57
• Niederle, Josef: On equalizers in the category of frames with weakly open homomorphisms. (English). Czechoslovak Mathematical Journal, vol. 42 (1992), issue 3, pp. 497-502
• Schwarz, Friedhelm; Weck-Schwarz, Sibylle: On hereditary and product-stable quotient maps. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 33 (1992), issue 2, pp. 345-352
• Frič, R.; Kent, D. C.: Regular $\cal L$-spaces. (English). Czechoslovak Mathematical Journal, vol. 42 (1992), issue 3, pp. 475-486
• Bentley, H. L.; Hunsaker, W. N.: Čech complete nearness spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 33 (1992), issue 2, pp. 315-328
• Hušek, Miroslav: Čech-Stone-like compactifications for general topological spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 33 (1992), issue 1, pp. 159-163
• Bentley, H. L.; Lowen-Colebunders, E.: Completely regular spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 32 (1991), issue 1, pp. 129-153
• Zarichnyi, M. M.: Distributivity law for the normal triples in the category of compacta and lifting of functors to the categories of algebras. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 32 (1991), issue 4, pp. 785-790
• Šmarda, B.: Completely normal locales. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 31 (1990), issue 2, pp. 101-104
• Schwarz, Friedhelm: Extensionable topological hulls and topological universe hulls inside the category of pseudotopological spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 31 (1990), issue 1, pp. 123-127
• Banaschewski, Bernhard: On pushing out frames. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 31 (1990), issue 1, pp. 13-21
• Lowen-Colebunders, Eva; Szabó, Zoltán Gábor: On the simplicity of some categories of closure spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 31 (1990), issue 1, pp. 95-98
• Trnková, Věra: Products of metric, uniform and topological spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 31 (1990), issue 1, pp. 167-180
• Herrlich, Horst: Realizations of topologies and closure operators by set systems and by neighbourhoods. (English). Archivum Mathematicum, vol. 25 (1989), issue 1, pp. 83-87
• Stramaccia, Luciano: Some remarks on preservation of topological products. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 30 (1989), issue 1, pp. 95-99
• Banaschewski, Bernhard: Another look at the localic Tychonoff theorem. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 29 (1988), issue 4, pp. 647-656
• Trnková, Věra; Hušek, Miroslav: Non-constant continuous maps of modifications of topological spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 29 (1988), issue 4, pp. 747-765
• Tozzi, A.; Wyler, O.: On categories of supertopological spaces. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 28 (1987), issue 2, pp. 137-149
• Lončar, Ivan: Relative continuity of the functor $\beta$. (English). Czechoslovak Mathematical Journal, vol. 37 (1987), issue 4, pp. 517-521
• Rice, Michael D.: Atoms in the family of coreflective subcategories of uniform spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 27 (1986), issue 2, pp. 209-220
• Beattie, Ronald; Butzmann, Heinz-Peter; Herrlich, Horst: Filter convergence via sequential convergence. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 27 (1986), issue 1, pp. 69-81
• Rosický, Jiří: A note on exponentiation in regular locales. (English). Archivum Mathematicum, vol. 22 (1986), issue 3, pp. 157-158
• Dikranjan, Dikran N.; Giuli, Eraldo: Ordinal invariants and epimorphisms in some categories of weak Hausdorff spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 27 (1986), issue 2, pp. 395-417
• Cagliari, F.; Cicchese, M.: Disconnectednesses and closure operators. (English). In: Frolík, Z., Souček, V. and Vinárek, J. (eds.): Proceedings of the 13th Winter School on Abstract Analysis. Section of Topology. Circolo Matematico di Palermo, Palermo, 1985. pp. [15]-23
• Šostak, A.: A fuzzy modification of the category of linearly ordered spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 26 (1985), issue 3, pp. 421-442
• Šostak, A. P.: On a fuzzy topological structure. (English). In: Frolík, Z., Souček, V. and Vinárek, J. (eds.): Proceedings of the 13th Winter School on Abstract Analysis. Section of Topology. Circolo Matematico di Palermo, Palermo, 1985. pp. [89]-103
• Kříž, I.; Pultr, A.: Products of locally connected locales. (English). In: Frolík, Z., Souček, V. and Vinárek, J. (eds.): Proceedings of the 13th Winter School on Abstract Analysis. Section of Topology. Circolo Matematico di Palermo, Palermo, 1985. pp. [61]-70
• Pedicchio, M. C.; Rossi, F.: A remark on monoidal closed structures on top. (English). In: Frolík, Z., Souček, V. and Vinárek, J. (eds.): Proceedings of the 13th Winter School on Abstract Analysis. Section of Topology. Circolo Matematico di Palermo, Palermo, 1985. pp. [77]-79
• Dikranjan, D.; Giuli, E.: Epimorphims and cowellpoweredness of epireflective subcategories of Top. (English). In: Frolík, Z. (ed.): Proceedings of the 12th Winter School on Abstract Analysis. Section of Topology. Circolo Matematico di Palermo, Palermo, 1984. pp. 121-136
• Arhangel'skii, Aleksander V.; Činčura, J.: On continuous images of almost Tychonoff cubes. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 25 (1984), issue 2, pp. 287-295
• Stramaccia, Luciano: Monomorphisms and epimorphisms of inverse systems. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 24 (1983), issue 3, pp. 495-505
• Baboolal, D.; Ori, Ramesh G.: On uniform connection properties. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 24 (1983), issue 4, pp. 747-754
• Salbany, Sergio: The completion monad and its algebra. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 23 (1982), issue 2, pp. 301-311
• Pechanec-Drahoš, J.: Presheaves over the sets which need not be well ordered, functional separation of their inductive limits and their representation by sections. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 20 (1979), issue 2, pp. 57-62
• Hušek, Miroslav: Products of uniform spaces. (English). Czechoslovak Mathematical Journal, vol. 29 (1979), issue 1, pp. 130-141
• Reiterman, Jan: Small-fibred semitopological functors without small-fibred initial completions. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 20 (1979), issue 3, pp. 539-546
• Činčura, Juraj: Tensor products in the category of topological spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 20 (1979), issue 3, pp. 431-446
• Pechanec-Drahoš, J.: Under an inductivity condition the stalks of the covering space of a presheaf are isomorphic (inductive and projective modifications of closurations of presheaves). (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 20 (1979), issue 2, pp. 63-73
• Rice, M. D.; Tashjian, Gloria J.: Cartesian-closed coreflective subcategories of uniform spaces. (English). In: Frolík, Z. (ed.): Abstracta. 6th Winter School on Abstract Analysis. Czechoslovak Academy of Sciences, Praha, 1978. pp. 75-76
• Bentley, H. L.; Herrlich, Horst: Completion as reflection. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 19 (1978), issue 3, pp. 541-568
• Nelson, Evelyn: Algebras of continuous functions in universal algebra. (English). In: Novák, Josef (ed.): General topology and its relations to modern analysis and algebra IV, Proceedings of the fourth Prague topological symposium, 1976. Part B: Contributed Papers. Society of Czechoslovak Mathematicians and Physicist, Praha, 1977. pp. [331]-332
• Bentley, H. L.; Herrlich, Horst; Robertson, W. A.: Convenient categories for topologists. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 17 (1976), issue 2, pp. 207-227
• Rice, Michael D.: Equi-reflective subcategories of uniform spaces. (English). In: Frolík, Zdeněk (ed.): Seminar Uniform Spaces. , 1978. pp. 75-78
• Rosický, J.: Liftings of functors in topological situations. (English). In: Novák, Josef (ed.): General topology and its relations to modern analysis and algebra IV, Proceedings of the fourth Prague topological symposium, 1976. Part B: Contributed Papers. Society of Czechoslovak Mathematicians and Physicist, Praha, 1977. pp. [394]-399
• Pták, Pavel: A note on normal topological functors and extensions of transformations. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 17 (1976), issue 3, pp. 567-574
• Hušek, Miroslav; Rice, Michael D.: Productivity of coreflective subcategories of uniform spaces. (English). In: Frolík, Zdeněk (ed.): Seminar Uniform Spaces. , 1978. pp. 105-109
• Hušek, Miroslav: Products of uniform spaces (Summary). (English). In: Frolík, Zdeněk (ed.): Seminar Uniform Spaces. , 1978. pp. 101-103
• Vilímovský, J.: Uniformly continuous Banach valued mappings. (English). In: Novák, Josef (ed.): General topology and its relations to modern analysis and algebra IV, Proceedings of the fourth Prague topological symposium, 1976. Part B: Contributed Papers. Society of Czechoslovak Mathematicians and Physicist, Praha, 1977. pp. [481]-484
• Herrlich, Horst: Epireflective subcategories of TOP need not be cowell-powered. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 16 (1975), issue 4, pp. 713-716
• Frolík, Zdeněk: On uniform spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 16 (1975), issue 1, pp. 189-199
• Pavelka, Jan: Correction to my paper: “Tensor products in the category of convergence spaces” [Comment. Math. Univ. Carolin. 13 (1972), 693-709]. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 15 (1974), issue 4, pp. 781-782
• Hušek, Miroslav; Pelant, Jan: Note about atom-categories of topological spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 15 (1974), issue 4, pp. 767-773
• Vilímovský, Jiří: Generation of coreflections in categories. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 14 (1973), issue 2, pp. 305-323
• Pavelka, Jan: Tensor products in the category of convergence spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 13 (1972), issue 4, pp. 693-709
• Preuss, G.: A categorical generalization of completely Hausdorff spaces. (English). In: Novák, J. (ed.): General Topology and its Relations to Modern Analysis and Algebra. Proceedings of the Third Prague Topological Symposium, 1971. Academia Publishing House of the Czechoslovak Academy of Sciences, Praha, 1972. pp. 361-362
• Herrlich, H.: A generalization of perfect maps. (English). In: Novák, J. (ed.): General Topology and its Relations to Modern Analysis and Algebra. Proceedings of the Third Prague Topological Symposium, 1971. Academia Publishing House of the Czechoslovak Academy of Sciences, Praha, 1972. pp. 187-191
• Chvalina, J.; Sekanina, M.: Realizations of closure spaces by set systems. (English). In: Novák, J. (ed.): General Topology and its Relations to Modern Analysis and Algebra. Proceedings of the Third Prague Topological Symposium, 1971. Academia Publishing House of the Czechoslovak Academy of Sciences, Praha, 1972. pp. 85-87
• Hušek, M.: Simple categories of topological spaces. (English). In: Novák, J. (ed.): General Topology and its Relations to Modern Analysis and Algebra. Proceedings of the Third Prague Topological Symposium, 1971. Academia Publishing House of the Czechoslovak Academy of Sciences, Praha, 1972. pp. 203-207
• Isbell, J. R.: $\bold T\bold o\bold p$ and its adjoint relatives. (English). In: Franklin, S. P., Frolík, Z. and Koutník, V. (eds.): General Topology and Its Relations to Modern Analysis and Algebra. Proceedings of the Kanpur topological conference, 1968. Academia Publishing House of the Czechoslovak Academy of Sciences, Praha, 1971. pp. [143]-154
• Banaschewski, B.: Projective covers in categories of topological spaces and topological algebras. (English). In: Franklin, S. P., Frolík, Z. and Koutník, V. (eds.): General Topology and Its Relations to Modern Analysis and Algebra. Proceedings of the Kanpur topological conference, 1968. Academia Publishing House of the Czechoslovak Academy of Sciences, Praha, 1971. pp. [63]-91
• Hušek, Miroslav: One more remark on reflections. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 8 (1967), issue 1, pp. 129-137
• Hušek, Miroslav: Categorial methods in topology. (English). In: General Topology and its Relations to Modern Analysis and Algebra. Proceedings of the second Prague topological symposium, 1966. Academia Publishing House of the Czechoslovak Academy of Sciences, Praha, 1967. pp. 190-194
• Banaschewski, B.: Projective covers in certain categories of topological spaces. (English). In: General Topology and its Relations to Modern Analysis and Algebra. Proceedings of the second Prague topological symposium, 1966. Academia Publishing House of the Czechoslovak Academy of Sciences, Praha, 1967. pp. 52-55
• Hušek, Miroslav: Remarks on reflections. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 7 (1966), issue 2, pp. 249-259
• Hušek, Miroslav: $S$-categories. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 5 (1964), issue 1, pp. 37-46