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54D55 Sequential spaces (101 articles)

• Tuyen, Luong Q.; Tuyen, Ong V.: Fréchet-Urysohn properties in rectifiable spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 66 (2025), issue 1, pp. 127-133
• Tuyen, Luong Quoc: On an affirmative answer to Y. Tanaka's and Y. Ge's problem. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 58 (2017), issue 1, pp. 125-129
• Sakai, Masami: Notes on strongly Whyburn spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 57 (2016), issue 1, pp. 123-129
• Kurilić, Miloš S.; Pavlović, Aleksandar: A convergence on Boolean algebras generalizing the convergence on the Aleksandrov cube. (English). Czechoslovak Mathematical Journal, vol. 64 (2014), issue 2, pp. 519-537
• Lin, Shou; Zhang, Jinhuang: Mapping theorems on countable tightness and a question of F. Siwiec. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 55 (2014), issue 4, pp. 523-536
• Lashkaripour, Rahmatollah; Talebi, Gholomraza: Lower bound and upper bound of operators on block weighted sequence spaces. (English). Czechoslovak Mathematical Journal, vol. 62 (2012), issue 2, pp. 293-304
• Moon, Mi Ae; Cho, Myung Hyun; Kim, Junhui: On AP spaces in concern with compact-like sets and submaximality. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 52 (2011), issue 2, pp. 293-302
• Sun, Weihua; Xu, Yuming; Li, Ning: On minimal strongly KC-spaces. (English). Czechoslovak Mathematical Journal, vol. 59 (2009), issue 2, pp. 305-316
• Song, Yan-Kui: On $\Cal C$-starcompact spaces. (English). Mathematica Bohemica, vol. 133 (2008), issue 3, pp. 259-266
• Song, Yan-Kui: Remarks on discretely absolutely star-Lindelöf spaces. (English). Czechoslovak Mathematical Journal, vol. 58 (2008), issue 3, pp. 823-831
• Xia, Shengxiang: Weak-open compact images of metric spaces. (English). Czechoslovak Mathematical Journal, vol. 58 (2008), issue 2, pp. 447-455
• Mynard, Anh Tran; Mynard, Frédéric: Closure spaces and characterizations of filters in terms of their Stone images. (English). Czechoslovak Mathematical Journal, vol. 57 (2007), issue 3, pp. 1025-1034
• Ge, Ying; Lin, Shou: $g$-metrizable spaces and the images of semi-metric spaces. (English). Czechoslovak Mathematical Journal, vol. 57 (2007), issue 4, pp. 1141-1149
• Tanaka, Yoshio: Tanaka spaces and products of sequential spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 48 (2007), issue 3, pp. 529-540
• Song, Yan-Kui: On $\scr L$-starcompact spaces. (English). Czechoslovak Mathematical Journal, vol. 56 (2006), issue 2, pp. 781-788
• Li, Zhaowen: On weak-open $\pi$-images of metric spaces. (English). Czechoslovak Mathematical Journal, vol. 56 (2006), issue 3, pp. 1011-1018
• Uzcátegui, Carlos: Topologies generated by ideals. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 47 (2006), issue 2, pp. 317-335
• Gerlits, J.; Juhász, I.; Szentmiklóssy, Z.: Two improvements on Tkačenko's addition theorem. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 46 (2005), issue 4, pp. 705-710
• Yoshioka, Iwao: On spaces with point-countable $k$-systems. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 45 (2004), issue 4, pp. 749-765
• Jordan, Francis; Mynard, Frédéric: Productively Fréchet spaces. (English). Czechoslovak Mathematical Journal, vol. 54 (2004), issue 4, pp. 981-990
• Song, Yan-Kui: Closed subsets of absolutely star-Lindelöf spaces II. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 44 (2003), issue 2, pp. 329-334
• Dolecki, Szymon; Starosolski, Andrzej; Watson, Stephen: Extension of multisequences and countably uniradial classes of topologies. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 44 (2003), issue 1, pp. 165-181
• Li, Jinjin: A note on $g$-metrizable spaces. (English). Czechoslovak Mathematical Journal, vol. 53 (2003), issue 2, pp. 491-495
• Obersnel, Franco: Open maps do not preserve Whyburn property. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 44 (2003), issue 3, pp. 525-530
• Tanaka, Yoshio: Products of $k$-spaces, and questions. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 44 (2003), issue 2, pp. 335-345
• Mynard, Frédéric: More on strongly sequential spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 43 (2002), issue 3, pp. 525-530
• Simon, Petr; Tironi, Gino: No hedgehog in the product?. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 43 (2002), issue 2, pp. 349-361
• Alas, Ofelia T.; Wilson, Richard G.: Spaces in which compact subsets are closed and the lattice of $T_1$-topologies on a set. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 43 (2002), issue 4, pp. 641-652
• Okunev, Oleg: Tightness of compact spaces is preserved by the $t$-equivalence relation. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 43 (2002), issue 2, pp. 335-342
• Tkachuk, V. V.; Yaschenko, I. V.: Almost closed sets and topologies they determine. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 42 (2001), issue 2, pp. 395-405
• Liu, Chuan: On weakly bisequential spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 41 (2000), issue 3, pp. 611-617
• Mynard, Frédéric: Strongly sequential spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 41 (2000), issue 1, pp. 143-153
• Song, Yan-Kui: Absolute countable compactness of products and topological groups. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 40 (1999), issue 2, pp. 367-372
• Costantini, Camillo: On a problem of Nogura about the product of Fréchet-Urysohn $\langle \alpha_4\rangle$-spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 40 (1999), issue 3, pp. 537-549
• Arhangel'skii, A. V.: On a theorem of W.W. Comfort and K.A. Ross. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 40 (1999), issue 1, pp. 133-151
• Bella, A.; Yaschenko, I. V.: On AP and WAP spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 40 (1999), issue 3, pp. 531-536
• Sitou, Saliou: On multisequences and their application to products of sequential spaces. (English). Mathematica Slovaca, vol. 49 (1999), issue 3, pp. 235-241
• Dolecki, S.; Nogura, T.: Two-fold theorem on Fréchetness of products. (English). Czechoslovak Mathematical Journal, vol. 49 (1999), issue 2, pp. 421-429
• Simon, Petr: A hedgehog in a product. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 39 (1998), issue 1, pp. 147-153
• Dolecki, Szymon; Pillot, Michel: Topologically maximal convergences, accessibility, and covering maps. (English). Mathematica Bohemica, vol. 123 (1998), issue 4, pp. 371-384
• Novák, Josef: A note on products of Fréchet spaces. (English). Czechoslovak Mathematical Journal, vol. 47 (1997), issue 2, pp. 337-340
• Bonanzinga, Maddalena: On the product of a compact space with an hereditarily absolutely countably compact space. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 38 (1997), issue 3, pp. 557-562
• Börger, R.: Connectivity properties of sequential Boolean algebras. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 36 (1995), issue 2, pp. 5-18
• Bella, Angelo: On spaces with the property of weak approximation by points. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 35 (1994), issue 2, pp. 357-360
• García-Ferreira, Salvador; Tamariz-Mascarúa, Angel: $p$-sequential like properties in function spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 35 (1994), issue 4, pp. 753-771
• Garcia-Ferreira, Salvador; Tamariz-Mascarua, Angel: On $p$-sequential $p$-compact spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 34 (1993), issue 2, pp. 347-356
• Ismail, M.; Szymański, A.: Short proofs of two theorems in topology. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 34 (1993), issue 3, pp. 539-541
• Bella, A.; Gerlits, J.: On a condition for the pseudo radiality of a product. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 33 (1992), issue 2, pp. 311-313
• Tkačenko, Michael G.: $\Cal P$-approximable compact spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 32 (1991), issue 3, pp. 583-595
• Bella, Angelo: More on the product of pseudo radial spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 32 (1991), issue 1, pp. 125-128
• Garcia-Ferreira, Salvador: On FU($p$)-spaces and $p$-sequential spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 32 (1991), issue 1, pp. 161-171
• Pochciał, Jan: Sequential characterizations of metrizability. (English). Czechoslovak Mathematical Journal, vol. 41 (1991), issue 2, pp. 203-215
• Frič, Roman: On plane topologies with high sequential order. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 31 (1990), issue 1, pp. 33-36
• Malykhin, V. I.: The sequentiality and the Fréchet-Urysohn property with respect to ultrafilters. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 31 (1990), issue 2, pp. 65-69
• Boldjiev, B.; Malykhin, Viacheslav I.: The sequentiality is equivalent to the ${\cal F}$-Fréchet-Urysohn property. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 31 (1990), issue 1, pp. 23-25
• Nogura, Tsugunori: Products of sequential convergence properties. (English). Czechoslovak Mathematical Journal, vol. 39 (1989), issue 2, pp. 262-279
• Frič, Roman; Záň, Stanislav: A note on diagonal and matrix properties of convergence spaces. (English). Mathematica Slovaca, vol. 38 (1988), issue 2, pp. 171-176
• Malykhin, Viacheslav I.: On countable Fréchet-Urysohn spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 29 (1988), issue 4, pp. 695-701
• Herrlich, Horst: Sequential structures induced by merotopies. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 29 (1988), issue 4, pp. 679-683
• Dimov, Georgi D.; Isler, Romano; Tironi, G.: On functions preserving almost radiality and their relations to radial and pseudo-radial spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 28 (1987), issue 4, pp. 751-781
• 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
• Frič, Roman; Zanolin, Fabio: Fine convergence in free groups. (English). Czechoslovak Mathematical Journal, vol. 36 (1986), issue 1, pp. 134-139
• Bella, Angelo: Free sequences in pseudo-radial spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 27 (1986), issue 1, pp. 163-170
• Arhangel'skii, Aleksander V.; Isler, R.; Tironi, G.: On pseudo-radial spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 27 (1986), issue 1, pp. 137-154
• Simon, Petr; Tironi, Gino: Two examples of pseudo-radial spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 27 (1986), issue 1, pp. 155-161
• Uspenskij, Vladimir Vladimirovich: A large $F_\sigma$-discrete Fréchet space having the Souslin property. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 25 (1984), issue 2, pp. 257-260
• Frič, Roman; Novák, Josef: A tiny peculiar Fréchet space. (English). Czechoslovak Mathematical Journal, vol. 34 (1984), issue 1, pp. 22-27
• Frič, Roman; Gavalec, Martin: On the Novák completion of convergence groups. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 24 (1983), issue 2, pp. 341-347
• Gerlits, János; Nagy, Zsigmond: Products of convergence properties. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 23 (1982), issue 4, pp. 747-756
• Bell, Murray G.: The space of complete subgraphs of a graph. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 23 (1982), issue 3, pp. 525-536
• Jané, Ignacio; Meyer, Paul R.; Simon, Petr; Wilson, Richard G.: On tightness in chain-net spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 22 (1981), issue 4, pp. 809-817
• Bashkirov, Aleksandr I.: There is no universal separable Fréchet or sequential compact space. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 22 (1981), issue 1, pp. 161-168
• Simon, Petr: A compact Fréchet space whose square is not Fréchet. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 21 (1980), issue 4, pp. 749-753
• Pytkeev, Evgenij G.; Yakovlev, N. N.: On bicompacta which are unions of spaces defined by means of coverings. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 21 (1980), issue 2, pp. 247-261
• Simon, Petr: Left-separated spaces: a comment to a paper of M. G. Tkačenko. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 20 (1979), issue 3, pp. 597-604
• Irwin, James M.; Kent, Darrell C.: Sequential Cauchy spaces. (English). Mathematica Slovaca, vol. 29 (1979), issue 2, pp. 117-130
• Frič, Roman; Koutník, Václav: Sequentially complete spaces. (English). Czechoslovak Mathematical Journal, vol. 29 (1979), issue 2, pp. 287-297
• Tkačenko, Michael G.: О бикомпaктax, пpeдcтaвимых в виде объeдинения cчётного числа левых подпространств. I. (Russian) [Bicompacta that are representable as the union of a countable number of left subspaces. I.]. Commentationes Mathematicae Universitatis Carolinae, vol. 20 (1979), issue 2, pp. 361-379
• Tkačenko, Michael G.: О бикомпaктax, пpeдcтaвимых в виде объeдинения cчётного числа левых подпространств. II. (Russian) [On bikompacta representable in the form of the union of a countable number of left subspaces. II.]. Commentationes Mathematicae Universitatis Carolinae, vol. 20 (1979), issue 2, pp. 381-395
• Arhangel'skii, Aleksander V.: On bicompacta which are unions of two subspaces of a certain type. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 19 (1978), issue 3, pp. 525-540
• Gerlits, János; Juhász, István: On left-separated compact spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 19 (1978), issue 1, pp. 53-62
• Frič, Robert; Kent, Darrell C.: Completion of sequential Cauchy spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 18 (1977), issue 2, pp. 351-361
• Arhangel'skii, Aleksander V.: On compact spaces which are unions of certain collections of subspaces of special type. II. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 18 (1977), issue 1, pp. 1-9
• Frič, Roman: On convergence spaces and groups. (English). Mathematica Slovaca, vol. 27 (1977), issue 4, pp. 323-330
• Rajagopalan, M.: Compact C-spaces and S-spaces. (English). In: General topology and its relations to modern analysis and algebra IV, Proceedings of the fourth Prague topological symposium, 1976. Part A: Invited papers. Springer, Berlin, 1977. pp. [179]-189
• Kannan, V.: Ordinal invariants in topology - summary. (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. [197]-206
• Frič, R.; Koutník, V.: Sequentially complete spaces. (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. 127-131
• Boone, James R.; Siwiec, Frank: Sequentially quotient mappings. (English). Czechoslovak Mathematical Journal, vol. 26 (1976), issue 2, pp. 174-182
• Frič, Roman: Extension of sequentially continuous mappings. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 16 (1975), issue 2, pp. 273-276
• Frič, Roman: Regularity and extension of mappings in sequential spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 15 (1974), issue 1, pp. 161-171
• Preiss, David; Simon, Petr: A weakly pseudocompact subspace of Banach space is weakly compact. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 15 (1974), issue 4, pp. 603-609
• Frič, Roman: Further note on Fréchet spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 14 (1973), issue 4, pp. 661-667
• Frič, Roman: A note on Fréchet spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 13 (1972), issue 3, pp. 411-418
• Rishel, T.: Nice spaces; nice 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. 375-383
• Kratochvíl, P.: On a convergence property of set algebras. (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. 253-255
• Novák, J.: On completions of convergence commutative groups. (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. 335-340
• Koutník, V.: On some convergence closures generated by functions. (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. 249-252
• Tironi, G.; Isler, R.: On some problems of local approximability in compact 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. 443-446
• Frič, R.: Sequential envelope and subspaces of the Čech-Stone compactification. (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. 123-126
• Meyer, P. R.: New cardinal invariants for topological spaces. (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. [201]-206
• Novák, J.: On some problems concerning the convergence spaces and groups. (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. [219]-229