Startseite Mathematik Compositions of porouscontinuous functions
Artikel
Lizenziert
Nicht lizenziert Erfordert eine Authentifizierung

Compositions of porouscontinuous functions

  • Stanisław Kowalczyk EMAIL logo und Małgorzata Turowska
Veröffentlicht/Copyright: 22. Januar 2019
Veröffentlichen auch Sie bei De Gruyter Brill

Abstract

The notion of porouscontinuity was introduced by Borsík and Holos. We find classes of functions whose compositions with porouscontinuous functions are still porouscontinuous. Next, we study compositions of porouscontinuous functions with homeomorphisms. We investigate connections between 𝓘𝓒(𝓐) ∩ 𝓗𝓞𝓜 and 𝓘𝓒(𝓑) ∩ 𝓗𝓞𝓜 for different classes 𝓐,𝓑 ∈ 𝓟𝓒, where 𝓟𝓒 is the set of all classes of porouscontinuous functions and 𝓗𝓞𝓜 is the set of all homeomorphisms f : ℝ → ℝ.

  1. Communicated by Ján Borsík

References

[1] Borsík, J.—Holos, J.: Some properties of porouscontinuous functions, Math. Slovaca 64(3) (2014), 741–750.10.2478/s12175-014-0237-3Suche in Google Scholar

[2] Bruckner, A. M.: Differentation of Real Functions. Lecture Notes in Math. 659, Springer-Verlag, 1978.10.1007/BFb0069821Suche in Google Scholar

[3] Kowalczyk, S.—Nowakowska, K.: Maximal classes for ϱ-upper continuous functions, J. Appl. Anal. 19 (2013), 69–89.10.1515/jaa-2013-0005Suche in Google Scholar

[4] Kowalczyk, S.—Turowska, M.: On structural properties of porouscontinuous functions, Math. Slovaca 67(5) (2017), 1239–1250.10.1515/ms-2017-0045Suche in Google Scholar

[5] Kowalczyk, S.: Compositions of ϱ-upper continuous functions, Math. Slovaca 66(3) (2016), 1–16.10.1515/ms-2015-0162Suche in Google Scholar

[6] Ostaszewski, K.: Continuity in the Density Topology, Real Anal. Exchange 7 (1981/82), 259–269.10.2307/44153412Suche in Google Scholar

[7] Zajíček, L.: Porosity and σ-porosity, Real Anal. Exchange 13 (1987/88), 314–350.10.2307/44151885Suche in Google Scholar

Received: 2017-11-30
Accepted: 2018-03-02
Published Online: 2019-01-22
Published in Print: 2019-02-25

© 2019 Mathematical Institute Slovak Academy of Sciences

Heruntergeladen am 16.12.2025 von https://www.degruyterbrill.com/document/doi/10.1515/ms-2017-0214/pdf?lang=de
Button zum nach oben scrollen