Toplam kayıt 90, listelenen: 69-88

    • Remarks on almost η-Ricci solitons in (ε)-para Sasakian manifolds 

      Blaga, Adara M.; Perktaş, Selcen Yüksel (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      We consider almost η-Ricci solitons in (ε)-para Sasakian manifolds satisfying certain curvature conditions. In the gradient case we give an estimation for the norm of the Ricci curvature tensor and express the scalar ...
    • Schatten-von Neumann characteristic of infinite tridiagonal block operator matrices 

      Al, Pembe İpek; İsmailov, Zameddin (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, the boundedness and compactness properties of infinite tridiagonal block operator matrices in the direct sum of Hilbert spaces are studied. The necessary and sufficient conditions for these operators belong ...
    • Sequentially Hausdorff and full sequentially Hausdorff spaces 

      Akız, Hürmet Fulya; Koçak, Lokman (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, we define the notions of sequentially Hausdorff Space and full sequentially Hausdorff space. Also we give the relationships between these notions and Hausdorffness.
    • Some characterizations for spacelike inclined curves 

      Akgün, M. Aykut; Sivridağ, A. İhsan (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper by establishing the Frenet frame {T,N,B₁,B₂} for a spacelike curve we give some characterizations for the spacelike inclined curves and B₂-slant helices in R₂⁴.
    • Some generalized Hermite-Hadamard type inequalities by using the harmonic convexity of differentiable mappings 

      Latif, Muhammad Amer; Hussain, Sabir (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, a general identity involving a di¤erentiable mapping is established. By using mathematical analysis, Hölder inequality and some auxiliary results, new generalized Hermite Hadamard type inequalities for ...
    • Some integral inequalities of the Hermite-Hadamard type for s-convex stochastic processes on n-coordinates 

      Okur, Nurgül; Karahan, Vildan (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this study, we identified s-convexity of first and second sense for multidimensional stochastic processes. Concordantly, we verified Hermite-Hadamard type inequalities for these processes. Besides, we exemplified these ...
    • Some Tauberian theorems for weighted means of double integrals 

      Çanak, İbrahim; Fındık, Gökşen (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      Let p(x) and q(y) be nondecreasing continuous functions on [0,∞) such that p(0)=q(0)=0 and p(x),q(y)→∞ as x,y→∞. For a locally integrable function f(x,y) on R₊²=[0,∞)×[0,∞), we denote its double integral by F(x,y)=∫₀^{x} ...
    • Spectral expansion of Sturm-Liouville problems with eigenvalue-dependent boundary conditions 

      Yokuş, Nihal; Arpat, Esra Kır (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, we consider the operator L generated in L₂(R₊) by the differential expression l(y)=-y′′+q(x)y,x∈R₊:=[0,∞) and the boundary condition ((y′(0))/(y(0)))=α₀+α₁λ+α₂λ², where q is a complex valued ...
    • Spherical indicatrices of a Bertrand curve in three dimensional Lie groups 

      Çakmak, Ali; Kızıltuğ, Sezai (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, new representations of a Bertrand curve pair in three dimensional Lie groups with bi-invariant metric are given. Besides, the spherical indicatrices of a Bertrand curve pair are obtained and the relations ...
    • Supra bT-set connected functions in supra topological spaces 

      Krishnaveni, K.; Vigneshwaran, M. (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, we came out with the new approach of functions called bT^{μ}-set connected functions and studied its properties. Also, we have retrieve separation axioms using bT^{μ}-set connected functions in supra topological ...
    • Texture spaces with ideal 

      Kule, Mehmet; Dost, Şenol (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, the authors define the notion of ideal on texture spaces. The concept of di-local function is also introduced here by utilizing the families of neighborhood structure for a ditopological texture space. ...
    • The cubic eigenparameter dependent discrete Dirac equations with principal functions 

      Köprübaşı, Turhan (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      Let us consider the Boundary Value Problem (BVP) for the discrete Dirac Equations {<K1.1/>┊ #0.1 <K1.1 ilk="MATRIX" > a_{n+1}y_{n+1}⁽²⁾+b_{n}y_{n}⁽²⁾+p_{n}y_{n}⁽¹⁾=λy_{n}⁽¹⁾ a_{n-1}y_{n-1}⁽¹⁾+b_{n}y_{n}⁽¹⁾+q_ ...
    • The dimension of products of n homogeneous components in free lie algebras 

      Masuroğlu, Nil (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      Let L be a free Lie algebra of finite rank r≥2 over a field F and we let L_{m_{i}} denote the degree m_{i} homogeneous component of L. Ralph Stöhr and Micheal Vaughan-Lee derived formulae for the dimension of the subspaces ...
    • The inverse kinematics of rolling contact of timelike curves lying on timelike surfaces 

      Aydınalp, Mehmet; Kazaz, Mustafa; Uğurlu, Hasan Hüseyin (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      Rolling contact between two surfaces plays an important role in robotics and engineering such as spherical robots, single wheel robots, and multi-fingered robotic hands to drive a moving surface on a fixed surface. The ...
    • The M-polynomial of line graph of subdivision graphs 

      Mondal, Sourav; De, Nilanjan; Pal, Anita (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      Three composite graphs Ladder graph (L_{n}), Tadpole graph (T_{n,k}) and Wheel graph (W_{n}) are graceful graphs, which have different applications in electrical, electronics, wireless communication etc. In this report, ...
    • The matrix sequence in terms of bi-periodic Fibonacci numbers 

      Coşkun, Arzu; Taşkara, Necati (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, we define the bi-periodic Fibonacci matrix sequence that represent bi-periodic Fibonacci numbers. Then, we investigate generating function, Binet formula and summations of bi-periodic Fibonacci matrix sequence. ...
    • The mean remaining strength of parallel systems in a stress-strength model based on exponential distribution 

      Kızılarslan, Fatih (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      The mean remaining strength of any coherent system is one of the important characteristics in stress-strength reliability. It shows that the system on the average how long can be safe under the stress. In this paper, we ...
    • The Topp-Leone generalized odd log-logistic family of distributions: properties, characterizations and applications 

      Korkmaz, M. Ç.; Yousof, H.M.; Alizadeh, M.; Hamedami, G. (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      A new family of distributions called the Topp-Leone generalized odd log-logistic-G family is introduced and studied. We provide some mathematical properties of the new family including ordinary and incomplete moments, ...
    • Vertex magic total labeling of middle and total graph of cycle 

      Kumar, Vimal; Vijayalakshmi, D. (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      A vertex magic total labeling is a bijection from the union of the vertex set and edge set to the consecutive integers 1,2,3,....,v+e with the property that for every u in the vertex set, the sum of the label of u and the ...
    • Weighted standard deviation method for X and S control charts 

      Karagöz, Derya (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      A Shewhart chart based on normality assumption is not appropriate for skewed distributions since its Type-I error rate is inflated. This study presents X and S control charts for monitoring the process variability for ...