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54C30 Real-valued functions (85 articles)

• Estaji, Ali Akbar; Taha, Maryam: The clean elements of the ring $\mathcal R(L)$. (English). Czechoslovak Mathematical Journal, vol. 74 (2024), issue 1, pp. 211-230
• Burgess, Walter D.; Raphael, Robert M.: On extending ${\rm C}^{k}$ functions from an open set to $\mathbb R$ with applications. (English). Czechoslovak Mathematical Journal, vol. 73 (2023), issue 2, pp. 487-498
• Estaji, Ali Akbar; Mahmoudi Darghadam, Ahmad: Some properties of algebras of real-valued measurable functions. (English). Archivum Mathematicum, vol. 59 (2023), issue 5, pp. 383-395
• Elyasi, M.; Estaji, A. A.; Robat Sarpoushi, M.: Locally functionally countable subalgebra of $\mathcal{R}(L)$. (English). Archivum Mathematicum, vol. 56 (2020), issue 3, pp. 127-140
• Mirmiran, Majid: Insertion of a Contra-Baire-$1$ (Baire-$.5$) Function. (English). Communications in Mathematics, vol. 27 (2019), issue 2, pp. 89-101
• Karimi Feizabadi, Abolghasem; Estaji, Ali Akbar; Abedi, Mostafa: On minimal ideals in the ring of real-valued continuous functions on a frame. (English). Archivum Mathematicum, vol. 54 (2018), issue 1, pp. 1-13
• Parsinia, Mehdi: On the mappings ${\mathcal Z}_A$ and $\Im_A$ in intermediate rings of $C(X)$. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 59 (2018), issue 3, pp. 383-390
• Natkaniec, Tomasz; Wódka, Julia: On the pointwise limits of sequences of Świątkowski functions. (English). Czechoslovak Mathematical Journal, vol. 68 (2018), issue 4, pp. 875-888
• Olfati, A. R.: Functionally countable subalgebras and some properties of the Banaschewski compactification. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 57 (2016), issue 3, pp. 365-379
• Olfati, A. R.: On a question of $C_c(X)$. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 57 (2016), issue 2, pp. 253-260
• Parsinia, Mehdi: Remarks on $LBI$-subalgebras of $C(X)$. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 57 (2016), issue 2, pp. 261-270
• Hager, Anthony W.: The $\sigma$-property in $C(X)$. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 57 (2016), issue 2, pp. 231-239
• Carbonell-Nicolau, Oriol: Semicontinuous integrands as jointly measurable maps. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 55 (2014), issue 2, pp. 189-193
• Ball, Richard N.; Hager, Anthony W.: Frame monomorphisms and a feature of the $l$-group of Baire functions on a topological space. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 54 (2013), issue 2, pp. 141-157
• Karlova, Olena: On $\alpha$-embedded sets and extension of mappings. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 54 (2013), issue 3, pp. 377-396
• Rajesh, N.; Vijayabharathi, V.: On strongly preirresolute topological vector spaces. (English). Mathematica Bohemica, vol. 138 (2013), issue 1, pp. 37-42
• Das, Pratulananda; Chandra, Debraj: Spaces not distinguishing pointwise and $\mathcal{I}$-quasinormal convergence. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 54 (2013), issue 1, pp. 83-96
• Korczak-Kubiak, Ewa; Pawlak, Ryszard J.: Trajectories, first return limiting notions and rings of $H$-connected and iteratively $H$-connected functions. (English). Czechoslovak Mathematical Journal, vol. 63 (2013), issue 3, pp. 679-700
• Dongsheng, Zhao: Partial dcpo’s and some applications. (English). Archivum Mathematicum, vol. 48 (2012), issue 4, pp. 243-260
• Tkachenko, M.: Cellularity and the index of narrowness in topological groups. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 52 (2011), issue 2, pp. 309-315
• Hager, Anthony W.: Local/global uniform approximation of real-valued continuous functions. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 52 (2011), issue 2, pp. 283-291
• Levy, R.; Matveev, M.: Functional separability. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 51 (2010), issue 4, pp. 705-711
• Larson, Suzanne: Functions that map cozerosets to cozerosets. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 48 (2007), issue 3, pp. 507-521
• Acharyya, Sudip Kumar; De, Dibyendu: An interesting class of ideals in subalgebras of $C(X)$ containing $C^*(X)$. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 48 (2007), issue 2, pp. 273-280
• Maliszewski, Aleksander: Maximums of Darboux Baire one functions. (English). Mathematica Slovaca, vol. 56 (2006), issue 4, pp. 427-431
• Fairey, Gareth; Gartside, Paul; Marsh, Andrew: Cardinal invariants of universals. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 46 (2005), issue 4, pp. 685-703
• Martínez, Jorge; Zenk, Eric R.: Dimension in algebraic frames, II: Applications to frames of ideals in $C(X)$. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 46 (2005), issue 4, pp. 607-636
• Li, Jinjin: On $k$-spaces and $k_R$-spaces. (English). Czechoslovak Mathematical Journal, vol. 55 (2005), issue 4, pp. 941-945
• Haleš, Jozef: On Scheepers' conjecture. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 46 (2005), issue 2, pp. 27-31
• Hager, Anthony W.; Kimber, Chawne M.; McGovern, Warren W.: Unique $a$-closure for some $\ell$-groups of rational valued functions. (English). Czechoslovak Mathematical Journal, vol. 55 (2005), issue 2, pp. 409-421
• Krzempek, Jerzy; Plewik, Szymon: Discontinuity points of exactly $k$-to-one functions. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 45 (2004), issue 2, pp. 55-58
• Banaschewski, Bernhard; Hong, Sung Sa: Completeness properties of function rings in pointfree topology. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 44 (2003), issue 2, pp. 245-259
• Jelínek, Jiří: A discontinuous function with a connected closed graph. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 44 (2003), issue 2, pp. 73-77
• Bukovský, Lev: Hurewicz properties, non distinguishing convergence properties and sequence selection properties. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 44 (2003), issue 2, pp. 45-56
• Ewert, Janina; Ponomarev, Stanislav P.: On the convergence of $\omega$-primitives. (English). Mathematica Slovaca, vol. 53 (2003), issue 1, pp. 59-66
• Ewert, Janina; Ponomarev, Stanislav P.: On the existence of $\omega$-primitives on arbitrary metric spaces. (English). Mathematica Slovaca, vol. 53 (2003), issue 1, pp. 51-57
• Vadovič, Peter: Zeros of continuous functions and the compact-open topology. (English). Mathematica Slovaca, vol. 53 (2003), issue 5, pp. 515-523
• Szczuka, Paulina: Maximums of strong Świątkowski functions. (English). Mathematica Slovaca, vol. 52 (2002), issue 5, pp. 541-548
• Duszynski, Zbigniew; Grande, Zbigniew; Ponomarev, Stanislav P.: On the $\omega$-primitive. (English). Mathematica Slovaca, vol. 51 (2001), issue 4, pp. 469-476
• Jakubík, Ján: Regular representations of semisimple MV-algebras by continuous real functions. (English). Mathematica Slovaca, vol. 51 (2001), issue 3, pp. 269-274
• Good, Chris; Stares, Ian: New proofs of classical insertion theorems. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 41 (2000), issue 1, pp. 139-142
• Repický, Miroslav: Spaces not distinguishing convergences. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 41 (2000), issue 4, pp. 829-842
• Maliszewski, Aleksander: Maximums of Darboux quasi-continuous functions. (English). Mathematica Slovaca, vol. 49 (1999), issue 3, pp. 381-386
• Kiriakouli, P.: Classifications and characterizations of Baire-1 functions. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 39 (1998), issue 4, pp. 733-748
• Grande, Zbigniew: On quasi-uniform convergence of a sequence of s.q.c. functions. (English). Mathematica Slovaca, vol. 48 (1998), issue 5, pp. 507-511
• Borsík, Ján; Frič, Roman: Pointwise convergence fails to be strict. (English). Czechoslovak Mathematical Journal, vol. 48 (1998), issue 2, pp. 313-320
• Li, Yong Min; Guo-jun, Wang: Localic Katětov-Tong insertion theorem and localic Tietze extension theorem. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 38 (1997), issue 4, pp. 801-814
• Kucia, Anna; Nowak, Andrzej: Normal integrands and related classes of functions. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 36 (1995), issue 4, pp. 775-781
• Porter, Jack R.; Stephenson, R. M., Jr.; Woods, Grant R.: Maximal pseudocompact spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 35 (1994), issue 1, pp. 127-145
• Paseka, Jan: Note on dense covers in the category of locales. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 35 (1994), issue 3, pp. 549-552
• Fremlin, D. H.: Sequential convergence in $C_p(X)$. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 35 (1994), issue 2, pp. 371-382
• Kubiak, Tomasz: A strengthening of the Katětov-Tong insertion theorem. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 34 (1993), issue 2, pp. 357-362
• Borsík, Ján: Sums of quasicontinuous functions. (English). Mathematica Bohemica, vol. 118 (1993), issue 3, pp. 313-319
• Marín, Josefa; Romaguera, Salvador: Correction to the paper: Pairwise monotonically normal spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 33 (1992), issue 1, pp. 181-181
• Fitzpatrick, Simon; Calvert, Bruce: Correction to the paper: Sets invariant under projections onto one dimensional subspaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 33 (1992), issue 1, pp. 182-182
• Žáčik, Tibor: On a shadowing lemma in metric spaces. (English). Mathematica Bohemica, vol. 117 (1992), issue 2, pp. 137-149
• Neubrunová, A.; Šalát, Tibor: On almost quasicontinuity. (English). Mathematica Bohemica, vol. 117 (1992), issue 2, pp. 197-205
• Sakai, Masami: On embeddings into $C_p(X)$ where $X$ is Lindelöf. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 33 (1992), issue 1, pp. 165-171
• Ceder, J. G.: On the fixed points in an $\omega$-limit set. (English). Mathematica Bohemica, vol. 117 (1992), issue 4, pp. 349-364
• Natkaniec, Tomasz: On the maximum and the minimum of quasi-continuous functions. (English). Mathematica Slovaca, vol. 42 (1992), issue 1, pp. 103-110
• Bentley, H. L.; Lowen-Colebunders, E.: Completely regular spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 32 (1991), issue 1, pp. 129-153
• Marín, Josefa; Romaguera, Salvador: Pairwise monotonically normal spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 32 (1991), issue 3, pp. 567-579
• Witzany, Jiří: Correspondence between interval $\pi$-equivalences and $Sd$-functions. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 30 (1989), issue 1, pp. 175-187
• Kucia, Anna; Nowak, Andrzej: On Baire approximations of normal integrands. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 30 (1989), issue 2, pp. 373-376
• Piotrowski, Zbigniew: Some remarks on almost continuous functions. (English). Mathematica Slovaca, vol. 39 (1989), issue 1, pp. 75-80
• Neubrunn, Tibor: On generalized Blumberg sets. (English). In: Frolík, Z., Souček, V. and Fabián, M. (eds.): Proceedings of the 14th Winter School on Abstract Analysis. Circolo Matematico di Palermo, Palermo, 1987. pp. [399]-405
• Balcerzak, Marek: On the generalized property $(K)$. (English). Mathematica Slovaca, vol. 36 (1986), issue 4, pp. 417-423
• Valov, Vesko: Some properties of $C_p (X)$. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 27 (1986), issue 4, pp. 665-672
• Balcerzak, Marek: A generalization of the theorem of Mauldin. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 26 (1985), issue 2, pp. 209-220
• Pu, Hwang Wen; Pu, Huo Hui Min: On a problem of L. Mišík. (English). Časopis pro pěstování matematiky, vol. 108 (1983), issue 1, pp. 89-92
• Blair, Robert L.: Extensions of Lebesgue sets and of real-valued functions. (English). Czechoslovak Mathematical Journal, vol. 31 (1981), issue 1, pp. 63-74
• Blum, I. E.; Swaminathan, Srinivasa: Ideal equivalences for almost real-compact spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 21 (1980), issue 1, pp. 81-95
• Vilímovský, J.: The inner structure of real extensors in uniform spaces. (English). In: Frolík, Z. (ed.): Abstracta. 7th Winter School on Abstract Analysis. Czechoslovak Academy of Sciences, Praha, 1979. pp. 88-91
• 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
• 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
• Veksler, A. I.: Functional characteristics of $P'$-spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 18 (1977), issue 2, pp. 363-366
• Hejcman, J.: Covering dimensions and partitions of unity. (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. 159-163
• Lukeš, Jaroslav; Zajíček, Luděk: Fine topologies as examples of non-Blumberg Baire spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 17 (1976), issue 4, pp. 683-688
• Demuth, Osvald: Об областях определения эффективных операторов над общерекурсинными функциями и конструктивных функций действительной переменной. (Russian) [The domains of definition of effective operators over general recursive functions and of constructive functions of a real variable]. Commentationes Mathematicae Universitatis Carolinae, vol. 17 (1976), issue 4, pp. 633-646
• Frolík, Zdeněk; Pelant, Jan; Vilímovský, Jiří: On hedgehog-topologically fine uniform spaces. (English). In: Frolík, Zdeněk (ed.): Seminar Uniform Spaces. , 1976. pp. 75-86
• Hager, Anthony W.: Real-valued functions on Alexandroff (zero-set) spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 16 (1975), issue 4, pp. 755-769
• Frolík, Zdeněk: Three technical tools in uniform spaces. (English). In: Frolík, Zdeněk (ed.): Seminar Uniform Spaces. , 1975. pp. 3-26
• Borges, C. R.: Four generalizations of stratifiable 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. 73-76
• Katětov, M.: On descriptive classification of 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. 235-242