Cristinel Mortici†, Dan-Ștefan Marinescu‡
The aim of this paper is to present an approach to Gâteaux and Fréchet differentiability based on delta-convex functions. We extend some results by Ivan and Rașa and by Marumo and Takeda.
Keywords: convexity, Gâteaux differentiability, Fréchet differentiability, delta-convex functions.
MSC: 49J50.
DOI 10.56082/annalsarscimath.2025.2.137
† Cristinel.mortici@hotmail.com, Valahia University of Târgoviște, Târgoviște, Romania; National University of Science & Technology Politehnica Bucharest; Academy of Romanian Scientists, 3 Ilfov, 050044, Bucharest, Romania
‡ marinescuds@gmail.com, National College “Iancu de Hunedoara”, Hunedoara, Romania
PUBLISHED in Annals Academy of Romanian Scientists Series on Mathematics and Its Application, Volume 17 no 2, 2025
