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26B05 Continuity and differentiation questions (42 articles)

• Zajíček, Luděk: On sets of discontinuities of functions continuous on all lines. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 63 (2022), issue 4, pp. 487-505
• Zajíček, Luděk: A remark on functions continuous on all lines. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 60 (2019), issue 2, pp. 211-218
• Karlova, Olena; Mykhaylyuk, Volodymyr; Sobchuk, Oleksandr: Diagonals of separately continuous functions of $n$ variables with values in strongly $\sigma$-metrizable spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 57 (2016), issue 1, pp. 103-122
• Kryštof, Václav; Zajíček, Luděk: Differences of two semiconvex functions on the real line. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 57 (2016), issue 1, pp. 21-37
• Evans, Michael J.; Humke, Paul D.: Two classes of Darboux-like, Baire one functions of two variables. (English). Czechoslovak Mathematical Journal, vol. 60 (2010), issue 2, pp. 549-569
• Bednařík, Dušan; Pastor, Karel: A characterization of $C^{1,1}$ functions via lower directional derivatives. (English). Mathematica Bohemica, vol. 134 (2009), issue 2, pp. 217-221
• Zajíček, Luděk: On sets of non-differentiability of Lipschitz and convex functions. (English). Mathematica Bohemica, vol. 132 (2007), issue 1, pp. 75-85
• Bednařík, Dušan; Pastor, Karel: Second-order sufficient condition for $\tilde\ell$-stable functions. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 46 (2007), issue 1, pp. 7-18
• Pavlica, David: A d.c. $C^1$ function need not be difference of convex $C^1$ functions. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 46 (2005), issue 1, pp. 75-83
• Pavlica, David: On the points of non-differentiability of convex functions. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 45 (2004), issue 4, pp. 727-734
• 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
• Ewert, Janina; Ponomarev, Stanislav P.: On the convergence of $\omega$-primitives. (English). Mathematica Slovaca, vol. 53 (2003), issue 1, pp. 59-66
• Zajíček, Luděk: Obecná teorie derivování funkcí a měr na katedře matematické analýzy MFF UK. (Czech) [General theory of differentiation of functions and measures studied at the Charles University]. Pokroky matematiky, fyziky a astronomie, vol. 45 (2000), issue 3, pp. 188-207
• Kulpa, W.; Socha, L.; Turzański, M.: Parametric extension of the Poincaré theorem. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 41 (2000), issue 2, pp. 39-46
• Fejzić, Hajrudin; Rinne, Dan; Weil, Clifford: Extending $n$ times differentiable functions of several variables. (English). Czechoslovak Mathematical Journal, vol. 49 (1999), issue 4, pp. 825-830
• Idczak, Dariusz: Distributional derivatives of functions of two variables of finite variation and their application to an impulsive hyperbolic equation. (English). Czechoslovak Mathematical Journal, vol. 48 (1998), issue 1, pp. 145-171
• Lavrič, Boris: Continuity of order-preserving functions. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 38 (1997), issue 4, pp. 645-655
• Buczolich, Zoltán; Pfeffer, Washek F.: Variations of additive functions. (English). Czechoslovak Mathematical Journal, vol. 47 (1997), issue 3, pp. 525-555
• Grande, Zbigniew: On some conditions which imply the continuity of almost all sections $x \to f(t,x)$. (English). Mathematica Bohemica, vol. 119 (1994), issue 1, pp. 49-56
• Lavrič, Boris: Continuity of monotone functions. (English). Archivum Mathematicum, vol. 29 (1993), issue 1, pp. 1-4
• Kontolatou, Angeliki: The quasi-real extension of the real numbers. (English). Acta Mathematica et Informatica Universitatis Ostraviensis, vol. 1 (1993), issue 1, pp. 27-36
• Grande, Zbigniew: A note about the almost continuity. (English). Mathematica Slovaca, vol. 42 (1992), issue 3, pp. 265-268
• Mařík, Jan Derivatives and convexity (English). Real Anal. Exchange 17 (2) (1991/92), 745–747
• Strońska, Ewa: L'espace linéaire des fonctions cliquées sur $R^n$ est généré par les fonctions quasi-continues. (French) [The linear space of cliquish functions on $R^n$ is generated by quasi-continuous functions]. Mathematica Slovaca, vol. 39 (1989), issue 2, pp. 155,156-164
• Pawlak, Helena: On continuity and monotonicity of Darboux functions. (English). Časopis pro pěstování matematiky, vol. 114 (1989), issue 1, pp. 39-44
• Neubrunn, Tibor: O jednom úniku od spojitosti. (Slovak) [On an escape of continuity]. Pokroky matematiky, fyziky a astronomie, vol. 33 (1988), issue 5, pp. 273-281
• Nekvinda, Aleš; Zajíček, Luděk: A simple proof of the Rademacher theorem. (English). Časopis pro pěstování matematiky, vol. 113 (1988), issue 4, pp. 337-341
• Kwiecińska, Grażyna: Measurability of real functions defined on the product of metric spaces. (English). Mathematica Slovaca, vol. 36 (1986), issue 3, pp. 267-281
• Aversa, Vincenzo; Laczkovich, M.; Preiss, David: Extension of differentiable functions. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 26 (1985), issue 3, pp. 597-609
• Musiał, Kazimierz: Pettis integration. (English). In: Frolík, Z., Souček, V. and Vinárek, J. (eds.): Proceedings of the 13th Winter School on Abstract Analysis. Section of Analysis. Circolo Matematico di Palermo, Palermo, 1985. pp. [133]-142
• Diferenciální počet. II. [4. vydání] (Czech) [Differential calculus. II. [4th edition]]. Academia, Praha, 1984, 672 s.
• Jarník, Vojtěch: Kapitola IX. Záměna proměnných. (Czech) [Chapter IX. Substitution of variables]. In: Jarník, Vojtěch: Diferenciální počet II. (Czech). Praha: Academia, 1984. pp. 475-503
• Jarník, Vojtěch: Kapitola VII. Parciální derivace a totální diferenciály. (Czech) [Chapter VII. Partial derivatives and total differentials]. In: Jarník, Vojtěch: Diferenciální počet II. (Czech). Praha: Academia, 1984. pp. 355-435
• Mišík, Ladislav: On continuous interval functions. (English). Mathematica Slovaca, vol. 34 (1984), issue 2, pp. 141-154
• Zajíček, Luděk: A note on partial derivatives of convex functions. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 24 (1983), issue 1, pp. 89-91
• Grande, Eulalia: Sur un problème concernant les fonctions quasicontinues. (French). Mathematica Slovaca, vol. 32 (1982), issue 3, pp. 309-312
• Diferenciální počet. II. [3. vydání] (Czech) [Differential calculus. II. [3rd edition]]. Academia, Praha, 1976, 669 s.
• Grande, Zbigniew: Quelques remarques sur les classes de Baire des fonctions de deux variables. (French). Mathematica Slovaca, vol. 26 (1976), issue 3, pp. 241-246
• Kojecká, Jitka: Lineare zweidimensionale Räume von stetigen Funktionen mit stetigen ersten Ableitungen. (German) [Linear two dimensional space of continuous functions with continuous derivative]. Sborník prací Přírodovědecké fakulty University Palackého v Olomouci. Matematika, vol. 14 (1974), issue 1, pp. 17-30
• Mišík, Ladislav: Über einen Satz von Khintchine. II. (German). Matematický časopis, vol. 24 (1974), issue 2, pp. 145-154
• Diferenciální počet. II. [2. vydání] (Czech) [Differential calculus. II. [2nd edition]]. Nakladelství Československé akademie věd, Praha, 1956, 609 s.
• Jarník, Vojtěch Diferenciální počet: Pokračování úvodu do počtu diferenciálního [1. vydání] (Czech) [Differential calculus: A continuation of the Introduction to the differential calculus]. Nakladatelství Československé akademie věd, Praha, 1953, 595 s.