Limits of approximately continuous functions. (English) Zbl 0221.26005


26A15 Continuity and related questions (modulus of continuity, semicontinuity, discontinuities, etc.) for real functions in one variable
26A21 Classification of real functions; Baire classification of sets and functions
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[1] D. Preiss: Limits of derivatives and Darboux-Baire functions. Rev. Roum. Math. Pures Appl. 14 (1969), 1201-1206. · Zbl 0188.35802
[2] Z. Zahorski: Sur la première derivée. Trans. Amer. Math. Soc. 69 (1950), 1-54. · Zbl 0038.20602
[3] K. Kuratowski: Topologie I. Warszava 1952.
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