On the almost monotone convergence of sequences of continuous functions

Zbigniew Grande

Open Mathematics (2011)

  • Volume: 9, Issue: 4, page 772-777
  • ISSN: 2391-5455

Abstract

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A sequence (f n)n of functions f n: X → ℝ almost decreases (increases) to a function f: X → ℝ if it pointwise converges to f and for each point x ∈ X there is a positive integer n(x) such that f n+1(x) ≤ f n (x) (f n+1(x) ≥ f n(x)) for n ≥ n(x). In this article I investigate this convergence in some families of continuous functions.

How to cite

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Zbigniew Grande. "On the almost monotone convergence of sequences of continuous functions." Open Mathematics 9.4 (2011): 772-777. <http://eudml.org/doc/269235>.

@article{ZbigniewGrande2011,
abstract = {A sequence (f n)n of functions f n: X → ℝ almost decreases (increases) to a function f: X → ℝ if it pointwise converges to f and for each point x ∈ X there is a positive integer n(x) such that f n+1(x) ≤ f n (x) (f n+1(x) ≥ f n(x)) for n ≥ n(x). In this article I investigate this convergence in some families of continuous functions.},
author = {Zbigniew Grande},
journal = {Open Mathematics},
keywords = {Almost monotone convergence; Continuity; Baire 1 class; Upper semicontinuity; Lower semicontinuity; Approximate continuity; almost monotone convergence; continuity; upper semicontinuity; lower semicontinuity; approximate continuity},
language = {eng},
number = {4},
pages = {772-777},
title = {On the almost monotone convergence of sequences of continuous functions},
url = {http://eudml.org/doc/269235},
volume = {9},
year = {2011},
}

TY - JOUR
AU - Zbigniew Grande
TI - On the almost monotone convergence of sequences of continuous functions
JO - Open Mathematics
PY - 2011
VL - 9
IS - 4
SP - 772
EP - 777
AB - A sequence (f n)n of functions f n: X → ℝ almost decreases (increases) to a function f: X → ℝ if it pointwise converges to f and for each point x ∈ X there is a positive integer n(x) such that f n+1(x) ≤ f n (x) (f n+1(x) ≥ f n(x)) for n ≥ n(x). In this article I investigate this convergence in some families of continuous functions.
LA - eng
KW - Almost monotone convergence; Continuity; Baire 1 class; Upper semicontinuity; Lower semicontinuity; Approximate continuity; almost monotone convergence; continuity; upper semicontinuity; lower semicontinuity; approximate continuity
UR - http://eudml.org/doc/269235
ER -

References

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  1. [1] Bruckner A.M., Differentiation of Real Functions, Lecture Notes in Math., 659, Springer, Berlin, 1978 Zbl0382.26002
  2. [2] Császár Á., Extensions of discrete and equal Baire functions, Acta Math. Hungar., 1990, 56(1–2), 93–99 http://dx.doi.org/10.1007/BF01903710 Zbl0731.54015
  3. [3] Császár Á., Laczkovich M., Discrete and equal convergence, Stud. Sci. Math. Hung., 1975, 10(3–4), 463–472 
  4. [4] Császár Á., Laczkovich M., Some remarks on discrete Baire classes, Acta Math. Acad. Sci. Hung., 1979, 33(1–2), 51–70 http://dx.doi.org/10.1007/BF01903381 Zbl0401.54010
  5. [5] Császár Á., Laczkovich M., Discrete and equal Baire classes, Acta Math. Hungar., 1990, 55(1–2), 165–178 http://dx.doi.org/10.1007/BF01951400 Zbl0718.54032
  6. [6] Grande Z., On discrete limits of sequences of approximately continuous functions and T ae-continuous functions, Acta Math. Hungar., 2001, 92(1–2), 39–50 http://dx.doi.org/10.1023/A:1013747909952 Zbl1002.26002
  7. [7] Petruska G., Laczkovich M., A theorem on approximately continuous functions, Acta Math. Acad. Sci. Hungar., 1973, 24(3–4), 383–387 http://dx.doi.org/10.1007/BF01958051 Zbl0289.26004
  8. [8] Preiss D., Limits of approximately continuous functions, Czechoslovak Math. J., 1971, 21(96)(3), 371–372 Zbl0221.26005
  9. [9] Sikorski R., Real Functions I, Monografie Matematyczne, 35, PWN, Warszawa, 1958 (in Polish) Zbl0093.05603
  10. [10] Tall F.D., The density topology, Pacific J. Math., 1976, 62(1), 275–284 Zbl0305.54039

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