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[1] 2002b:54006 Fremlin, David; Natkaniec, Tomasz; Rec\l aw, Ireneusz Universally Kuratowski-Ulam spaces. Fund. Math. 165 (2000), no. 3, 239--247. (Reviewer: R. M. Stephenson, Jr.) 54B10 (54E52)
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[2] 2001m:26024 Ciesielski, Krzysztof; Natkaniec, Tomasz; Wojciechowski, Jerzy Extending connectivity functions on $\Bbb R\sp n$. Topology Appl. 112 (2001), no. 2, 193--204. (Reviewer: Zbigniew Grande) 26B05 (54C30)
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[3] 2000i:26004 Natkaniec, Tomasz; Rec\l aw, Ireneusz Universal summands for families of measurable functions. Acta Sci. Math. (Szeged) 64 (1998), no. 3-4, 463--471. 26A15 (03E15 28A05 28A20)
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[4] 2000h:26007 Gibson, Richard G.; Natkaniec, Tomasz Darboux-like functions. Old problems and new results. Real Anal. Exchange 24 (1998/99), no. 2, 487--496. (Reviewer: Ryszard J. Pa\.wlak) 26A15 (54C30)
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[5] 2000f:26008 Ciesielski, Krzysztof; Natkaniec, Tomasz Darboux-like functions that are characterizable by images, preimages and associated sets. Real Anal. Exchange 23 (1997/98), no. 2, 441--457. 26A21 (26A15 54C30)
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[6] 2000f:26005 Jastrz\c ebski, Jan; Natkaniec, Tomasz On sums and products of extendable functions. Real Anal. Exchange 24 (1998/99), no. 2, 589--598. (Reviewer: Zbigniew Grande) 26A15 (54C08)
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[7] 2000e:26003 Banaszewski, Krzysztof; Natkaniec, Tomasz Sierpi\'nski-Zygmund functions that have the Cantor intermediate value property. Real Anal. Exchange 24 (1998/99), no. 2, 827--835. (Reviewer: Krzysztof Ciesielski) 26A15
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[8] 99k:26001 Ciesielski, Krzysztof; Natkaniec, Tomasz On Sierpi\'nski-Zygmund bijections and their inverses. Topology Proc. 22 (1997), Spring, 155--164. (Reviewer: Volodymyr K. Maslyuchenko) 26A15 (03E35 03E75)
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[9] 99i:26003 Natkaniec, Tomasz Some cardinal invariants in real analysis. Real functions (Liptovsk\'y Ján, 1996). Tatra Mt. Math. Publ. 14 (1998), 39--45. (Reviewer: Ryszard J. Pa\.wlak) 26A15 (03E10 54A25)
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[10] 99f:26004 Ciesielski, Krzysztof; Gibson, Richard G.; Natkaniec, Tomasz $\kappa$-to-$1$ Darboux-like functions. Real Anal. Exchange 23 (1997/98), no. 2, 671--687. (Reviewer: Ryszard J. Pa\.wlak) 26A15
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[11] 99c:04003 Ciesielski, Krzysztof; Natkaniec, Tomasz Algebraic properties of the class of Sierpi\'nski-Zygmund functions. Topology Appl. 79 (1997), no. 1, 75--99. (Reviewer: Marion Scheepers) 04A20 (03E50 03E65 26A15)
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[12] 98k:26005 Balcerzak, Marek; Ciesielski, Krzysztof; Natkaniec, Tomasz Sierpi\'nski-Zygmund functions that are Darboux, almost continuous, or have a perfect road. Arch. Math. Logic 37 (1997), no. 1, 29--35. (Reviewer: Ryszard J. Pa\.wlak) 26A15 (03E50 03E65)
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[13] 98h:26004 Gibson, Richard G.; Natkaniec, Tomasz Darboux like functions. Real Anal. Exchange 22 (1996/97), no. 2, 492--533. (Reviewer: Jack B. Brown) 26A15 (26A21 54C30)
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[14] 98d:54032 Katafiasz, Aleksandra; Natkaniec, Tomasz A new variant of Blumberg's theorem. Real Anal. Exchange 22 (1996/97), no. 2, 806--813. 54C30 (26A15)
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[15] 98a:26007 Natkaniec, Tomasz New cardinal invariants in real analysis. Bull. Polish Acad. Sci. Math. 44 (1996), no. 2, 251--256. (Reviewer: Jack B. Brown) 26A15 (03E75 54A25)
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[16] 97j:26003 Natkaniec, Tomasz On ${\scr D}\sp {**}$-Darboux functions. Problemy Mat. No. 11 (1994), 31--35. (Reviewer: Ryszard J. Pa\.wlak) 26A15 (26A21)
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[17] 97g:26002 Natkaniec, Tomasz Extendability and almost continuity. Real Anal. Exchange 21 (1995/96), no. 1, 349--355. 26A15 (54C08)
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[18] 96k:54019 Natkaniec, Tomasz On sets determined by limits of a real function. Zeszyty Nauk. Politech. \L ódz. Mat. No. 27 (1995), 95--105. 54C30 (26A15)
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[19] 96c:54019 Maliszewski, A.; Natkaniec, T. Almost continuous functions of two variables. Rev. Real Acad. Cienc. Exact. Fís. Natur. Madrid 87 (1993), no. 2-3, 395--404. (Reviewer: W. Stephen Watson) 54C08 (54C20 54D20)
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[20] 95k:26001 Natkaniec, Tomasz On iterations of Darboux functions. Real Anal. Exchange 20 (1994/95), no. 1, 350--355. (Reviewer: A. M. Bruckner) 26A18
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[21] 95j:54016 Natkaniec, Tomasz On Cartesian products and diagonals of quasi-continuous and cliquish maps. Problemy Mat. No. 12 (1993), 9--15. (Reviewer: Janina Ewert) 54C08
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[22] 95j:26005 Natkaniec, Tomasz; Rec\l aw, Ireneusz Cardinal invariants concerning functions whose product is almost continuous. Real Anal. Exchange 20 (1994/95), no. 1, 281--285. 26A15
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[23] 95g:26006 Natkaniec, T. On sums of Darboux functions. Selected papers from the 21st Winter School on Abstract Analysis (Pod\v ebrady, 1993). Acta Univ. Carolin. Math. Phys. 34 (1993), no. 2, 107--111. (Reviewer: Clifford E. Weil) 26A21
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[24] 95b:26004 Natkaniec, T. On a problem concerning universally bad Darboux functions. Real Anal. Exchange 18 (1992/93), no. 2, 471--475. 26A21
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[25] 94k:26005 Natkaniec, Tomasz On Grande's problem concerning $\scr B\sp *\sb 1$ functions. Math. Slovaca 43 (1993), no. 4, 455--457. (Reviewer: Pavel Kostyrko) 26A15 (26A21)
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[26] 94j:26006 Natkaniec, Tomasz On quasi-continuous functions having Darboux property. Math. Pannon. 3 (1992), no. 2, 81--96. (Reviewer: D. K. Dutta) 26A15 (54C08)
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[27] 94f:54029 Natkaniec, T. Arcwise almost continuous functions. Real Anal. Exchange 18 (1992/93), no. 2, 508--521. (Reviewer: S. A. Naimpally) 54C08 (26B40)
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[28] 94f:54028 Natkaniec, Tomasz Almost continuity. Wy\.zsza Szko\l a Pedagogiczna w Bydgoszczy, Bydgoszcz, 1992. x+131 pp. (Reviewer: Ivan L. Reilly) 54C08
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[29] 94c:54005 Grande, Z.; Natkaniec, T. On some topologies of O'Malley's type on the plane. Real Anal. Exchange 18 (1992/93), no. 1, 241--248. (Reviewer: W\l adys\l aw Wilczy\'nski) 54A10 (26B05 28A20 54B10 54E52)
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[30] 94b:26006b Natkaniec, T. Errata: "Products of Darboux functions". Real Anal. Exchange 18 (1992/93), no. 2, 619. (Reviewer: Ryszard J. Pa\.wlak) 26A21
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[31] 94b:26006a Natkaniec, T. Products of Darboux functions. Real Anal. Exchange 18 (1992/93), no. 1, 232--236. (Reviewer: Ryszard J. Pa\.wlak) 26A21
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[32] 93k:28002 Kirchheim, B.; Natkaniec, T. Exceptional directions for Sierpi\'nski's nonmeasurable sets. Fund. Math. 140 (1992), no. 3, 237--245. (Reviewer: El\.zbieta Wagner) 28A05
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[33] 93e:54009 Natkaniec, T. Almost continuity. Real Anal. Exchange 17 (1991/92), no. 2, 462--520. 54C08 (26A15 26B05)
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[34] 93c:54006 Natkaniec, Tomasz On compositions and products of almost continuous functions. Fund. Math. 139 (1991), no. 1, 59--74. (Reviewer: Mila Mr\v sevi\'c) 54C08 (26A15)
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[35] 93b:54013 Natkaniec, Tomasz On the maximum and the minimum of quasi-continuous functions. Math. Slovaca 42 (1992), no. 1, 103--110. (Reviewer: Nikolay V. Zhivkov) 54C30 (26A15)
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[36] 92h:26006 Jastrz\polhk ebski, J. M.; J\polhk edrzejewski, J. M.; Natkaniec, T. On some subclasses of Darboux functions. Fund. Math. 138 (1991), no. 3, 165--173. (Reviewer: Clifford E. Weil) 26A21 (54C99)
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[37] 92h:26004 Natkaniec, Tomasz Products of quasi-continuous functions. Math. Slovaca 40 (1990), no. 4, 401--405. (Reviewer: J. G. Ceder) 26A15 (26A21)
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[38] 92f:26004 Jastrz\polhk ebski, J. M.; J\polhk edrzejewski, J. M.; Natkaniec, T. Points of almost continuity of real functions. Real Anal. Exchange 16 (1990/91), no. 2, 415--420. (Reviewer: C. Vinti) 26A15
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[39] 92f:26002 Grande, Z.; Natkaniec, T. On quasi-continuous bijections. Acta Math. Univ. Comenian. (N.S.) 60 (1991), no. 1, 31--34. 26A15
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[40] 92d:26011 Kirchheim, Bernd; Natkaniec, Tomasz On universally bad Darboux functions. Real Anal. Exchange 16 (1990/91), no. 2, 481--486. 26A21
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[41] 91j:54023 Natkaniec, Tomasz Two remarks on almost continuous functions. Problemy Mat. No. 10 (1990), 71--78. (Reviewer: Mila Mr\v sevi\'c) 54C10 (26A15 26A21 54C30 54C50)
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[42] 90m:26008 Natkaniec, Tomasz; Orwat, Waldemar Variations on products and quotients of Darboux functions. Real Anal. Exchange 15 (1989/90), no. 1, 193--202. (Reviewer: J. G. Ceder) 26A21
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[43] 90d:26021 Dogo\'nski, Antoni; Natkaniec, Tomasz Simple examples of lattices generated by some families of functions. (Polish) Problemy Mat. No. 9 (1988), 123--135. (Reviewer: Zbigniew Grande) 26A99 (06B99 46E99)
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[44] 89m:26021 Grande, Zbigniew; Natkaniec, Tomasz; Stro\'nska, Ewa Algebraic structures generated by $d$-quasi-continuous functions. Bull. Polish Acad. Sci. Math. 35 (1987), no. 11-12, 717--723. (Reviewer: D. Preiss) 26B05 (28A20)
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[45] 89g:54036 Natkaniec, Tomasz On continuity and semicontinuity points. Fundamental theorems. Problemy Mat. No. 8 (1987), 17--30. 54C30 (54C05 54C08)
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[46] 89e:26008 Natkaniec, Tomasz On lattices generated by Darboux functions. Bull. Polish Acad. Sci. Math. 35 (1987), no. 9-10, 549--552. (Reviewer: Jaroslav Smítal) 26A21 (54H05)
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[47] 89d:26005 Grande, Zbigniew; Natkaniec, Tomasz Lattices generated by ${\scr T}$-quasicontinuous functions. Bull. Polish Acad. Sci. Math. 34 (1986), no. 9-10, 525--530 (1987). 26A15 (46A99)
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[48] 88c:26002 Natkaniec, Tomasz Some multiplicative properties of sets of real numbers. Problemy Mat. No. 7 (1986), 47--50. (Reviewer: J. G. Ceder) 26A03
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[49] 88c:04006 Natkaniec, Tomasz On ideals of the sets on the real line which contain the ideal of the sets of power $<2\sp {\omega\sb 0}$. Problemy Mat. No. 5-6 (1986), 61--67. (Reviewer: W. W. Comfort) 04A30 (03E50 28A05)
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[50] 88a:28002 Dogo\'nski, Antoni; Molenda, Agata; Natkaniec, Tomasz; Orwat, Waldemar; Zagozda, Ma\l gorzata; Zglinicka, Ma\l gorzata Borel ideals. (Polish) Problemy Mat. No. 7 (1986), 107--116. (Reviewer: Janina Ewert) 28A05 (54H05)
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[51] 88a:26008 Natkaniec, T. The lattice generated by differentiable functions. Real Anal. Exchange 12 (1986/87), no. 1, 247--251. (Reviewer: F. Brooks) 26A24 (46E05)
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[52] 87m:26004 Natkaniec, Tomasz On $I$-continuity and $I$-semicontinuity points. Math. Slovaca 36 (1986), no. 3, 297--312. (Reviewer: J. C. Oxtoby) 26A15
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[53] 87i:03100 Natkaniec, Tomasz On projections of planar sets. Real Anal. Exchange 11 (1985/86), no. 2, 411--415. (Reviewer: Shu-Tang Wang) 03E15 (26A99)
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[54] 87d:26004 Natkaniec, Tomasz On points of qualitative semicontinuity. \v Casopis P\v est. Mat. 110 (1985), no. 4, 337--342, 413. (Reviewer: Rotraut Goubau Cahill) 26A15
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[55] 85e:26001 Natkaniec, Tomasz On semicontinuity points. Real Anal. Exchange 9 (1983/84), no. 1, 215--232. (Reviewer: F. Brooks) 26A15
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[56] 873 909 Natkaniec, T. Some remarks on category projections of planar sets. Real Anal. Exchange 12 (1986/87), no. 1, 387--392. 26B99
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