Başlık için Cilt:70 Sayı:01 (2021) listeleme

Toplam kayıt 40, listelenen: 13-32

    • Deferred Nörlund statistical relative uniform convergence and Korovkin-type approximation theorem 

      Demirci, Kamil; Dirik, Fadime; Yıldız, Sevda (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      In this paper, we define the concept of statistical relative uniform convergence of the deferred Nörlund mean and we prove a general Korovkin-type approximation theorem by using this convergence method. As an application, ...

    • Determination of a time-dependent potential in a Rayleigh-Love equation with non-classical boundary condition 

      Tekin, İbrahim (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      Mathematical model of the longitudinal vibration of bars includes higher-order derivatives in the equation of motion under considering the effect of the lateral motion of a relatively thick bar. This paper considers such ...

    • Differential geometric aspects of nonlinear Schrödinger equation 

      Erdoğdu, Melek; Yavuz, Ayşe (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      The main scope of this paper is to examine the smoke ring (or vortex filament) equation which can be viewed as a dynamical system on the space curve in E³. The differential geometric properties the soliton surface accociated ...

    • Dual-complex generalized k-Horadam numbers 

      Köme, Sure; Köme, Cahit; Yazlık, Yasin (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      The purpose of this paper is to provide a broad overview of the generalization of the various dual-complex number sequences, especially in the disciplines of mathematics and physics. By the help of dual numbers and ...

    • Existence and decay of solutions for a higher-order viscoelastic wave equation with logarithmic nonlinearity 

      Pişkin, Erhan; Irkıl, Nazlı (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      The main goal of this paper is to study for the local existence and decay estimates results for a high-order viscoelastic wave equation with logarithmic nonlinerity. We obtain several results: Firstly, by using Feado-Galerkin ...

    • Green's function for impulsive periodic solutions in alternately advanced and delayed differential systems and applications 

      CHİU, Kuo-shou (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      In this paper we investigate the existence of the periodic solutions of a nonlinear impulsive differential system with piecewise alternately advanced and retarded arguments, in short IDEPCAG, that is, the argument is a ...

    • Hermite-Hadamard-Fejér inequalities for double integrals 

      Budak, Hüseyin; Sarıkaya, Mehmet Zeki (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      In this paper, we first obtain Hermite-Hadamard-Fejer inequalities for co-ordinated convex functions in a rectangle from the plane R2. Moreover, we give the some refinement of these obtained Hermite-Hadamard-Fejer inequalities ...

    • Implementation of computation formulas for certain classes of Apostol-type polynomials and some properties associated with these polynomials 

      Küçükoğlu, İrem (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      The main purpose of this paper is to present various identities and computation formulas for certain classes of Apostol-type numbers and polynomials. The results of this paper contain not only the λ -Apostol-Daehee ...

    • Implementation of DRBEM for the determination of the heat flux in an inverse problem 

      Alsoy-Akgün, Negehan (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      A numerical investigation of inverse unsteady natural convection flow in a square cavity filled with C u − water nanofluid is performed. In the direct problem, the enclosure is bounded by one isothermally heated ...

    • Intuitionistic fuzzy hypersoft sets 

      Yolcu, Adem; SMARANDACHE, Florentin; Öztürk, Taha Yasin (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      In this paper, a new environment namely, intuitionistic fuzzy hypersoft set (IFHSS) is defined. We introduce some fundamental operators of intuitionistic fuzzy hypersoft sets such as subset, null set, absolute set, complement, ...

    • Lump-type solutions of a new extended (3+1)-dimensional nonlinear evolution equation 

      Yıldırım, Yakup; Yaşar, Emrullah (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      In this paper, we study lump-type solutions to a new extended (3+1)-dimensional nonlinear evolution equation which appears in the field of wave propagation in the nonlinear systems. We generate these types of solutions by ...

    • Medical model estimation with particle swarm optimization 

      Sarı, Murat; Ahmad, Arshed; Uslu, Hande (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      In this paper, a nonlinear medical model based on observational variables has been produced and the particle swarm optimization (PSO) technique, which is an effective technique to predict optimum parameters of the biomedical ...

    • Natural and conjugate mates of Frenet curves in three-dimensional Lie group 

      Mak, Mahmut (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      In this study, we introduce the natural mate and conjugate mate of a Frenet curve in a three dimensional Lie group G with bi-invariant metric. Also, we give some relationships between a Frenet curve and its natural ...

    • New fuzzy differential subordinations 

      Oros, Georgia İ. (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      In this paper, some new fuzzy differential subordinations obtained by using the integral operator Im γ : An →An introduced in [13] are obtained.

    • Nonparametric modeling via two-way mixed effects design 

      Demircioğlu, Sevgi; Güven, Bilgehan (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      The classical F-test for testing the hypothesis of no fixed main effects in a mixed effects design is valid under the assumption of normality, symmetry and variance homogeneity of the error terms assumption. We consider ...

    • On almost Hurewicz property in bitopological spaces 

      CHAUHAN, Harsh Vardhan; SİNGH, Beenu (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      The purpose of this paper is to investigate properties and results of the almost Hurewicz property in bitopological spaces. We characterize this property using ( i , j ) - regular open sets and almost continuous ...

    • On exponential type P-functions 

      Numan, Selim; İşcan, İmdat (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      In this paper, we introduce and study the concept of exponential type P-function and establish Hermite-Hadamard's inequalities for this type of functions. In addition, we obtain some new Hermite-Hadamard type inequalities ...

    • On the lifts of F_{a}(5,1)-structure on tangent and cotangent bundle 

      JABRAİLZADE, Fidan (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      This paper consist of three main sections. In the first part, we obtain the complete lifts of the F_{a}(5,1)-structure on tangent bundle. We have also obtained the integrability conditions by calculating the Nijenhuis ...

    • On the Lipschitz stability of inverse nodal problem for Dirac system 

      Yılmaz, Emrah; Kemaloğlu, Hikmet (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      Inverse nodal problem on Dirac operator is determination problem of the parameters in the boundary conditions, number m and potential function V by using a set of nodal points of a component of two component vector ...

    • Pseudo pure-injective objects 

      Bertaş, Mustafa Kemal (Ankara Üniversitesi Fen Fakültesi, 2021-06-30)
      We show that if M and N are pure essentially equivalent objects in a finitely accessible additive category A such that M is pseudo pure-N- injective and N is pseudo pure-M-injective, then M≅N.