Research Article

On the Korovkin-type approximation of set-valued continuous functions

Volume: 4 Number: 1 March 1, 2021
EN

On the Korovkin-type approximation of set-valued continuous functions

Abstract

This paper is devoted to some Korovkin approximation results in cones of Hausdorff continuous set-valued functions and in spaces of vector valued functions. Some classical results are exposed in order to give a more complete treatment of the subject. New contributions are concerned both with the general theory than in particular with the so-called convexity monotone operators, which are considered in cones of set-valued function and also in spaces of vector-valued functions.

Keywords

Thanks

Work performed under the auspices of G.N.A.M.P.A. (INdAM)

References

  1. F. Altomare, M. Campiti: Korovkin-type Approximation Theory and Its Applications, De Gruyter Studies in Mathematics 17, Berlin-Heidelberg-New York, (1994).
  2. F. Altomare, M. Cappelletti, V. Leonessa and I. Ra¸sa: Markov Operators, Positive Semigroups and Approximation Processes, De Gruyter Studies in Mathematics 61, Berlin-Munich-Boston, (2015).
  3. H. Berens, G. G. Lorentz: Geometric theory of Korovkin sets, J. Approx. Theory, 15 (3) (1975), 161–189.
  4. M. Campiti: A Korovkin-type theorem for set-valued Hausdorff continuous functions, Le Mathematiche, 42 (I–II) (1987), 29–35.
  5. M. Campiti: Approximation of continuous set-valued functions in Fréchet spaces I, Rev. Anal. Numér. Théor. Approx., 20 (1–2) (1991), 15–23.
  6. M. Campiti: Approximation of continuous set-valued functions in Fréchet spaces II, Rev. Anal. Numér. Théor. Approx., 20 (1–2) (1991), 24–38.
  7. M. Campiti: Korovkin theorems for vector-valued continuous functions, in "Approximation Theory, Spline Functions and Applications" (Internat. Conf., Maratea, May 1991), 293–302, Nato Adv. Sci. Inst. Ser. C: Math. Phys. Sci. 356, Kluwer Acad. Publ., Dordrecht, 1992.
  8. M. Campiti: Convergence of nets of monotone operators between cones of set-valued functions, Atti dell’Accademia delle Scienze di Torino, 126 (1992), 39–54.

Details

Primary Language

English

Subjects

Mathematical Sciences

Journal Section

Research Article

Publication Date

March 1, 2021

Submission Date

January 17, 2021

Acceptance Date

January 28, 2021

Published in Issue

Year 2021 Volume: 4 Number: 1

APA
Campıtı, M. (2021). On the Korovkin-type approximation of set-valued continuous functions. Constructive Mathematical Analysis, 4(1), 119-134. https://doi.org/10.33205/cma.863145
AMA
1.Campıtı M. On the Korovkin-type approximation of set-valued continuous functions. CMA. 2021;4(1):119-134. doi:10.33205/cma.863145
Chicago
Campıtı, Michele. 2021. “On the Korovkin-Type Approximation of Set-Valued Continuous Functions”. Constructive Mathematical Analysis 4 (1): 119-34. https://doi.org/10.33205/cma.863145.
EndNote
Campıtı M (March 1, 2021) On the Korovkin-type approximation of set-valued continuous functions. Constructive Mathematical Analysis 4 1 119–134.
IEEE
[1]M. Campıtı, “On the Korovkin-type approximation of set-valued continuous functions”, CMA, vol. 4, no. 1, pp. 119–134, Mar. 2021, doi: 10.33205/cma.863145.
ISNAD
Campıtı, Michele. “On the Korovkin-Type Approximation of Set-Valued Continuous Functions”. Constructive Mathematical Analysis 4/1 (March 1, 2021): 119-134. https://doi.org/10.33205/cma.863145.
JAMA
1.Campıtı M. On the Korovkin-type approximation of set-valued continuous functions. CMA. 2021;4:119–134.
MLA
Campıtı, Michele. “On the Korovkin-Type Approximation of Set-Valued Continuous Functions”. Constructive Mathematical Analysis, vol. 4, no. 1, Mar. 2021, pp. 119-34, doi:10.33205/cma.863145.
Vancouver
1.Michele Campıtı. On the Korovkin-type approximation of set-valued continuous functions. CMA. 2021 Mar. 1;4(1):119-34. doi:10.33205/cma.863145

Cited By