Tür "Article" Cilt:68 Sayı:02 (2019) için listeleme

Toplam kayıt 90, listelenen: 21-40

    • Certain subclasses of bi-univalent functions related to k-Fibonacci numbers 

      Güney, Özlem H.; Murugusundaramoorthy, G.; Sokol, Janusz (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, we introduce and investigate new subclasses of bi-univalent functions related to k-Fibonacci numbers. Furthermore, we nd estimates of first two coecients of functions in these classes. Also, we obtain the ...

    • Coefficient bounds for a certain subclass of analytic and bi-univalent functions 

      Mustafa, Nizami; Nezir, Veysel (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, we introduce and investigate a new subclass of the a-nalytic and bi-univalent functions in the open unit disk in the complex plane. For the functions belonging to this class, we obtain estimates on the first ...

    • Coefficient estimates for a new subclass of m-fold symmetric analytic bi-univalent functions 

      Bulut, Serap (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      Considering a new subclass of m-fold symmetric analytic bi-univalent functions, we determine estimates the coefficient bounds for the Taylor-Maclaurin coefficients |a_{m+1}| and |a_{2m+1}| of the functions in this class. ...

    • Convergence of solutions of nonautonomous Nicholson's Blowflies model with impulses 

      Demirci, Elif; Karakoç, Fatma (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      This paper deals with a nonautonomous Nicholson's blowflies model with impulses. It is shown that under the proper conditions every positive solution of the model approaches to a constant as t tends to infinity.

    • Convolution Properties for Salagean-type Analytic Functions Defined by q- Difference Operator 

      Çetinkaya, Asena (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, we define Salagean-type analytic functions by using concept of q- derivative operator. We investigate convolution properties and coefficient estimates for Salagean-type analytic functions denoted by ...

    • Decision making for portfolio selection by fuzzy multi criteria linear programming 

      Akbaş, Serkan; Dalkılıç, Türkan Erbay (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In daily life events, there are many complexities arising from lack of information and uncertainty. Fuzzy linear programming model has been developed to reduce or eliminate this complexity. Fuzzy linear programming is the ...

    • Degree based topological invariants of splitting graph 

      Mohanappriya, G.; Vijayalakshmi, D. (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      Topological invariants are the graph theoretical tools to the theoretical chemists, that correlates the molecular structure with several chemical reactivity, physical properties or biological activity numerically. A function ...

    • Equilibrium and Stability Analysis of Takagi-Sugeno Fuzzy Delayed Cohen-Grossberg Neural Networks 

      Özcan, Neyir (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      This paper carries out an investigation into the problem of the global asymptotic stability of the class of Takagi-Sugeno (T-S) fuzzy delayed Cohen-Grossberg neural networks with discrete time delays. A new sufficient ...

    • Equitable edge chromatic number of P_{m}⊗S_{n}⁰ and S_{m}⁰⊗S_{n}⁰ 

      Vivik, J. Veninstine (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      The equitable edge chromatic number is the minimum number of colors required to color the edges of a graph G and satisfies the criterion, if for each vertex v∈V(G), the number of edges of any one color incident with v ...

    • f-Biminimal submanifolds of generalized space forms 

      Karaca, Fatma (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      We study f-biminimal submanifolds in generalized complex space forms and generalized Sasakian space forms. Then, we analyze f-biminimal submanifolds in these spaces. Finally, we consider f-biminimal integral submanifolds ...

    • Fixed point results for Pata contraction on a metric space with a graph and its application 

      Arian, Asma; Ramezani, Maryam (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      Let ( X , d ) be a metric space endowed with a graph G such that the set V ( G ) of vertices of G coincides with X ‎. ‎We define the notion of Pata- G -contraction type maps and obtain some fixed ...

    • Fuzzy Markov chains modeling of aggregation processes 

      Çatak, Nursin Bas (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, the fuzzy Markov chain method is proposed as a new discrete solution of a population balance equation for an aggregation process. In order to validate the proposed method, analytical solution of an aggregation ...

    • Generalizations of some results on generalized polynomial identities 

      Eroğlu, Münevver Pınar (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      Motivated by the generalized polynomial identities in [1] and [5], our aim is to generalize some of the results in these works. Precisely, we extend the result in [1] on commuting values of the same generalized derivations ...

    • Global existence and stability results for Hadamard--Volterra--Stieltjes integral equations 

      Baghdad, Said; Benchohra, Mouffak (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper we prove the existence and stability of solutions of a class of Hadamard--Volterra--Stieltjes integral equations in the Banach space of continuous and bounded functions on unbounded interval. That result is ...

    • Henneberg's algebraic surfaces in Minkowski 3-space 

      Güler, Erhan; Zambak, Vahit (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      Bu çalışmada, üç boyutlu Minkowski uzayında Henneberg minimal yüzeyi ele alınmış olup yüzeyin derece, sınıf ve integralden bağımsız gösterinleri verilniştir.

    • https://doi.org/10.31801/cfsuasmas.586057 

      Shahzad, Usman; Luengo, Amelia Victoria Garcia; Koyuncu, Nursel; Hanif, Muhammad (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      Koyuncu and Kadilar <cite>kk.2009</cite> introduced a family of estimators under simple random sampling. In this article; we adapt these estimators for ranked set sampling. Further, we suggest a regression-type estimator ...

    • I-lacunary statistical convergence of weighted g via modulus functions in 2-normed spaces 

      Savaş, Ekrem; Yamancı, Ulaş; Gürdal, Mehmet (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, we introduce new concepts of I-statistical convergence and I-lacunary statistical convergence using weighted density via modulus functions. Also, we study the relationship between them and obtain some ...

    • Improved Hermite Hadamard type inequalities for harmonically convex functions via Katugampola fractional integrals 

      Şanlı, Zeynep; Köroğlu, Tuncay; Kunt, Mehmet (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper,we proved three new Katugampola fractional Hermite- Hadamard type inequalities for harmonically convex functions by using the left and the right fractional integrals independently. One of our Katugampola frac- ...

    • Investigation of the dependence structure in seismic hazard analysis: an application for Turkey 

      Karaçam, Serpil Ünal (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this study, using the earthquake occurrence data (Richter magnitude is equal to 4 or greater than 4 in the years 1901-2014) of the areas limited by 39.5°-42° N latitudes and 26°-45° E longitudes of North Anatolia and ...

    • Local T2 extended pseudo-quasi-semi metric spaces 

      Baran, Tesnim Meryem (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, we characterize various local T₂ extended pseudo-quasi-semi metric spaces and investigate the relationships among these various forms. Finally, we give some invariance properties of these local T₂ extended ...