On some modification of Darboux property

Author:

Ivanova Gertruda1,Wagner-Bojakowska Elżbieta2

Affiliation:

1. Institute of Mathematics Academia Pomeraniensis ul. Arciszewskiego 22d 76–200 Słupsk POLAND

2. Faculty of Mathematics and Computer Science Łódź University ul. Stefana Banacha 22 PL–90 238 Łódź POLAND

Abstract

Abstract We introduce some family of functions f: ℝ → ℝ modifying Darboux property analogously as it was done in GRANDE, Z.: On a subclass of the family of Darboux functions, Colloq. Math. 117 (2009), 95-104, and changing approximate continuity with 𝓘-approximate continuity, i.e. continuity with respect to the 𝓘-density topology. We prove that our family is a strongly porous set in the space of Darboux functions having the Baire property and that each function from our family is quasi-continuous.

Publisher

Walter de Gruyter GmbH

Subject

General Mathematics

Reference18 articles.

1. Bruckner, A. M.: Differentiation of Real Functions. Lecture Notes in Math. 659, Springer, Berlin, 1978.

2. Ciesielski, K.-Larson, L.-Ostaszewski, K.: I-Density Continuous Functions. Mem. Amer. Math. Soc. 515, Amer. Math. Soc., Providence, RI, 1994.

3. Grande, Z.: On a subclass of the family of Darboux functions, Colloq. Math. 117 (2009), 95-104.

4. Ivanova, G.: Remarks on some modification of the Darboux property, Bull. Soc. Sci. Lett. Łódź Sér. Rech. Déform. 63 (2013), 91-100.

5. Holý, D.-Matejička, L.: Quasicontinuous functions, minimal USCO maps and topology of pointwise convergence, Math. Slovaca 60 (2010), 507-520.

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