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    Approximation of functions by a new class of Gamma type operators; theory and applications
    (Ovidius Univ Press, 2024) Ozcelik, Reyhan; Kara, Emrah Evren; Usta, Fuat
    The study of the linear methods of approximation, which are given by sequences of positive and linear operators, studied extremely, in relation to different subjects of analysis, such as numerical analysis. The principal objective of this manuscript is to develop a new and more comprehensive version of Gamma type operators and presented their approximation features. For this purpose, we benefit from two sequences of functions, which are alpha(n)(x) and beta(n)(x), and from the function tau(x). To indicate how the function tau play a significant role in the construction of the operator, we reconstruct the mentioned operators which preserve exactly two test functions from the set {1, tau, tau(2)}. Then we established Voronovskaya type theorem and order of approximation properties of the newly defined operators utilizing weighted modulus of continuity to show that their approximation properties. At the end of this note, we present a series of numerical results to show that the new operators are an approximation technique.
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    FIXED POINTS OF (alpha, phi)-MEIR-KEELER CONTRACTIVE MAPPINGS IN GENERALIZED RECTANGULAR b-METRIC SPACES
    (Mili Publ, 2019) Ozcelik, Reyhan; Ilkhan, Merve; Kara, Emrah Evren
    The main objective of this work is to develop fixed point results for (alpha, phi)-Meir-Keeler contractive mappings in generalized rectangular b-metric spaces and to investigate the uniqueness of fixed points.