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Now showing items 50-69 of 98

    • On a new subclass of bi-univalent functions satisfying subordinate conditions 

      Altınkaya, Şahsene; Mazı, Emeka (Ankara Üniversitesi Fen Fakültesi, 2019-02-01)
      The purpose of our present paper is to introduce a new subclass of bi-univalent functions associated with pseudo-starlike function with Sakaguchi type functions and to determine the coefficient estimates |a₂| and |a₃| for ...
    • On a new variation of injective modules 

      Türkmen, Ergül; Türkmen, Burcu Nişancı; Pancar, Ali; Nebiyev, Celil (Ankara Üniversitesi Fen Fakültesi, 2019-02-01)
      In this paper, we provide various properties of GE and GEE-modules, a new variation of injective modules. We call M a GE-module if it has a g-supplement in every extension N and, we call also M a GEE-module if it has ample ...
    • On a type of α-cosymplectic manifolds 

      Beyendi, Selahattin; Ayar, Gülhan; Aktan, Nesip (Ankara Üniversitesi Fen Fakültesi, 2019-02-01)
      The object of this paper is to study α-cosymplectic manifolds admitting a W₂-curvature tensor.
    • On almost α-para-Kenmotsu manifolds satisfyıng certain conditions 

      Erken, İrem Küpeli (Ankara Üniversitesi Fen Fakültesi, 2019-02-01)
      In this paper, we study some remarkable properties of almost α-para-Kenmotsu manifolds. We consider projectively flat, conformally flat and concircularly flat almost α-para-Kenmotsu manifolds (with the η-parallel tensor ...
    • On Andersson's inequality for yyperbolically convex functions 

      FARİED, Nashat; ALİ, Mohamed S. S; YEHİA, Zeinab M. (Ankara Üniversitesi Fen Fakültesi, 2019-02-01)
      In this paper, we use Andersson's Inequality for ordinary convex functions to prove a similar inequalities concerning hyperbolically convex functions.
    • On Approximation Properties of Two Variables of Modified Kantorovich-Type Operators 

      Özhavzalı, Müzeyyen; Olgun, Ali (Ankara Üniversitesi, 2019-02-01)
      In the present paper, we introduce certain modification of Szász-Mirakyan-Kantorovich-type operators in polynomial weighted spaces of continuous functions of two variables. Then we research some approximation properties ...
    • On b-coloring of central graph of some graphs 

      Kalpana, M.; Vijayalakshmi, D. (Ankara Üniversitesi Fen Fakültesi, 2019-02-01)
      The b-chromatic number of G, denoted by ϕ(G), is the maximum k for which G has a b-coloring by k colors. A b-coloring of G by k colors is a proper k-coloring of the vertices of G such that in each color class i there exists ...
    • On commutativity of prime near-rings with multiplicative generalized derivation 

      Bedir, Zeliha; Gölbaşı, Öznur (Ankara Üniversitesi, 2019-02-01)
      In the present paper, we shall prove that 3-prime near-ring N is commutative ring, if any one of the following conditions are satisfied: (i) f(N)⊆Z, (ii) f([x,y])=0, (iii) f([x,y])=±[x,y], (iv) f([x,y])=±(xoy), (v) ...
    • On Complex Modified Genuine Szász-Durrmeyer-Stancu Operators 

      Çetin, Nursel (Ankara Üniversitesi, 2019-02-01)
      In this paper, we introduce complex modified genuine Szász-Durrmeyer-Stancu operators to improve the results obtained in [4] and present overconvergence properties of these operators. We obtain some estimates on the rate ...
    • On irregular colorings of double wheel graph families 

      Rohini, A.; Venkatachalam, M. (Ankara Üniversitesi Fen Fakültesi, 2019-02-01)
      An assignment of colors to the vertices of a graph, so that no two adjacent vertices get the same color is called a proper coloring. An irregular coloring of a graph is a proper vertex coloring that distinguishes vertices ...
    • On minimal free resolution of the associated graded rings of certain monomial curves : New proofs in A⁴ 

      Zengin, Esra Emine; Mete, Pınar (Ankara Üniversitesi Fen Fakültesi, 2019-02-01)
      In this article, even if it is known for general case in <cite>sharifan-nahandi</cite>, we give the explicit minimal free resolution of the associated graded ring of certain affine monomial curves in affine 4-space based ...
    • On New Hermite-Hadamard-Fejér type inequalities for harmonically quasi convex functions 

      Turhan, Sercan; İşcan, İmdat (Ankara Üniversitesi Fen Fakültesi, 2019-02-01)
      In this paper, we give the theorems and results for the trapezoidal and midpoint type inequality of new Hermite-Hadamard-Fejér for harmonically-quasi convex functions via fractional integrals.
    • On new subclasses of bi-univalent functions defined by generalized Sălăgean differential operator 

      Toklu, Evrim; Aktaş, İbrahim; Sağsöz, Fatma (Ankara Üniversitesi Fen Fakültesi, 2019-02-01)
      The aim of this investigation is to introduce two new subclasses of the class σ related with the generalized Sălăgean differential operator and find estimates on the coefficients |a₂| and |a₃| for functions in these new ...
    • On r- dynamic coloring of the family of bistar graphs 

      NANDİNİ, G.; VENKATACHALAM, M.; GOWRİ, S. (Ankara Üniversitesi Fen Fakültesi, 2019-02-01)
      An r-dynamic coloring of a graph G is a proper coloring c of the vertices such that |c(N(v))|≥min{r,d(v)}, for each v∈V(G). The r-dynamic chromatic number of a graph G is the minimum k such that G has an r-dynamic coloring ...
    • On the Construction of Generalized Bobillier Formula 

      Erişir, Tülay; Güngör, Mehmet Ali; Ersoy, Soley (Ankara Üniversitesi, 2019-02-01)
      In this study, we consider the generalized complex number system C_{p}={x+iy:x,y∈R,i²=p∈R} corresponding to elliptical complex number, parabolic complex number and hyperbolic complex number systems for the special cases ...
    • On the Geometry of the Tangent Bundle With Vertical Rescaled Metric 

      DİDA, Hamou Mohammed; HATHOUT, Fouzi; AZZOUZ, Abdelhalim (Ankara Üniversitesi, 2019-02-01)
      Let (M,g) be a n-dimensional smooth Riemannian manifold. In the present paper, we introduce a new class of natural metrics denoted by G^{f} and called the vertical rescaled metric on the tangent bundle TM. We calculate its ...
    • On the linear codes over the ring Z₄+v₁Z₄+...+v_{t}Z₄ 

      Dertli, Abdullah; Cengellenmiş, Yasemin (Ankara Üniversitesi Fen Fakültesi, 2019-02-01)
      Some results on linear codes over the ring Z₄+uZ₄+vZ₄,u²=u,v²=v,uv=vu=0 in [6,7] are generalized to the ring D_{t}=Z₄+v₁Z₄+...+v_{t}Z₄,v_{i}²=v_{i},v_{i}v_{j}=v_{j}v_{i}=0 for i≠j,1≤i,j≤t. A Gray map Φ_{t} from D_{t}ⁿ to ...
    • On the numerical solution of the Klein-Gordon equation by exponential cubic B-spline collocation method 

      Hepson, Özlem Ersoy; Korkmaz, Alper; Dağ, Alper (Ankara Üniversitesi, 2019-02-01)
      In the present study, we solve initial boundary value problem constructed on nonlinear Klein-Gordon equation. The collocation method on exponential cubic B-spline functions forming a set of basis for the functions defined ...
    • On the rate of convergence of the g-Navier-Stokes equations 

      Kaya, Meryem; Kazar, Özge; Kantar, Ülkü Dinlemez (Ankara Üniversitesi, 2019-02-01)
      In this paper we consider 2D g-Navier-Stokes equations in a bounded domain by Ω. We give an error estimate between the solutions of Galerkin approximation of the g-Navier-Stokes equations and the exact solutions of them.
    • On the Representations and Characters of Cat¹-Groups and Crossed Modules 

      Davvaz, B.; Dehghani, M. A. (Ankara Üniversitesi, 2019-02-01)
      Let G be a group and V a K-vector space. A K-linear representation of G with representation space V is a homomorphism φ:G→GL(V). The dimension of V is called the degree of φ. If φ is a representation of G, then the character ...