Toplam kayıt 90, listelenen: 42-61

    • Mean ergodic type theorems 

      Oğuz, Gencay; Orhan, Cihan (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      Let T be a bounded linear operator on a Banach space X . Replacing the Ces\`{a}ro matrix by a regular matrix A = ( a n j ) Cohen studied a mean ergodic theorem. In the present paper we extend his result ...
    • On (λ,A)-statistical convergence of order α 

      Şengül, Hacer; Koyun, Özlem (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In the paper [B. de Malafosse and V. Rakočević, Linear Algebra Appl. 420, no. 2-3, (2007), 377--387], authors defined the concept of (λ,A)-statistical convergence. In this paper, the concept of (λ,A)-statistical convergence ...
    • On a graph of ideals of a commutative ring 

      Khoramdel, Mehdi; Atani, Shahabaddin Ebrahimi; Pishhesari, Saboura Dolati (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, we introduce and investigate a new graph of a commutative ring R, denoted by G(R), with all nontrivial ideals of R as vertices, and two distinct vertices I and J are adjacent if and only if ann(I∩J)=ann(I)+ann(J). ...
    • On a solvable system of difference equations of higher-order with period two coefficients 

      Yazlık, Yasin; Kara, Merve (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      We show that the next difference equations system x_{n+1}=((a_{n}x_{n-k+1}y_{n-k})/(y_{n}-α_{n}))+β_{n+1}, y_{n+1}=((b_{n}y_{n-k+1}x_{n-k})/(x_{n}-β_{n}))+α_{n+1}, n∈N₀, where N₀=N∪{0}, the sequences (a_{n})_{n∈N₀}, ...
    • On achromatic number of central graph of some graphs 

      Nithyadevi, N.; Vijayalakshmi, D. (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      The concept of coloring a graph will lead to the definition of a complete n- coloring of a graph G which results the achromatic number ψ(G) where the maximum number of colors required for the points of G in which every ...
    • On Borel convergence of double sequences 

      Yamancı, Ulaş (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, we introduce the concept of (Ber)-convergence of bounded double sequences in the Fock space F(C²). We show that every (Ber)-convergent double sequence is Borel convergent. Namely, we prove the following ...
    • On equitable chromatic number of Tadpole graph T_{m,n} 

      Venkatachalam, M.; Praveena, K. (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      Graph coloring is a special case of graph labeling. Proper vertex k-coloring of a graph Gis to color all the vertices of a graph with different colors in such a way that no two adjacent vertices are assigned with the same ...
    • On generalized taxicab metric in three dimensional space 

      Çolakoğlu, Harun Barış (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, we define the generalized taxicab distance function in three dimensional space, which includes the taxicab distance function as a special case, and we show that three dimensional generalized taxicab distance ...
    • On generic submanifold of Sasakian manifold with concurrent vector field 

      Yoldaş, Halil İbrahim; Meriç, Şemsi Eken; Yaşar, Erol (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In the present paper, we deal with the generic submanifold admitting a Ricci soliton in Sasakian manifold endowed with concurrent vector field. Here, we find that there exists never any concurrent vector field on the ...
    • On irregular coloring of wheel related graphs 

      Rohini, A.; Venkatachalam, M. (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      An irregular coloring is a proper coloring in which distinct vertices have different color codes. In this paper, we obtain the irregular chromatic number for middle graph, total graph, central graph and line graph of wheel ...
    • On some approximation properties of the Gauss-Weierstrass operators 

      Yılmaz, Başar (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, we present some approximation properties of the Gauss-Weierstrass operators in exponential weighted spaces including norm convergence of them and Voronovskaya and quantitative Voronovskaya-type theorems.
    • On some new inequalities of Hermite Hadamard types for hyperbolic p-convex functions 

      Yehia, Zeinab; Faried, Nashat; Ali, Mohamed S. S. (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, we show that the power function fn(x) is hyperbolic p-convex function. Furthermore, we establish some new integral inequalities for higher powers of hyperbolic p-convex functions. Also, some applications for ...
    • On some problems regarding set valued (α,ψ)-F-contractions 

      Nazam, Muhammad; Aydi, Hassen; Arshad, Muhammad (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, we introduce set valued (α,ψ) F-contraction mappings in the setting of a partial metric space. We obtain some common fixed point theorems for a pair of these mappings. These results generalize several recent ...
    • On Stancu type generalization of (p,q)-Baskakov-Kantorovich operators 

      Kanat, Kadir; Sofyalıoğlu, Melek (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In the current paper, we introduce Stancu type generalization of Baskakov-Kantorovich operators based on (p, q)-integers and estimate the moments. We show the convergence of the new operators via the weighted Korovkin ...
    • On strong N_{θ}^{α}(A,F)-convergence 

      Şengül, Hacer; Arıca, Zelal (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In the papers [T. Bilgin, Studia Univ. Babeş-Bolyai Math. 46(4), (2001), 39--46] and [T. Bilgin, Appl. Math. Comput. 151(3), (2004), 595--600], author defined the spaces of strongly N_{θ}(A,f)-convergent with respect to a ...
    • On subsequentially convergent sequences 

      Sezer, S. A.; Çanak, İ. (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this study we obtain some sufficient conditions under which subsequential convergence of a sequence of real numbers follows from its boundedness. Eventually, we obtain crucial information about the subsequential behavior ...
    • On the evolute offsets of ruled surfaces using the Darboux frame Yıl 2019, Cilt 68, Sayı 2, 1256 - 1264, 01.08.2019 

      Şentürk, Gülsüm Yeliz; Yüce, Salim (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this study, using Darboux frame {T,g,n} of ruled surface ϕ(s,v), the evolute offsets ϕ^{∗}(s,v) with Darboux frame {T^{∗},g^{∗},n^{∗}} of ϕ(s,v) are defined. Characteristic properties of ϕ^{∗}(s,v) as a striction curve, ...
    • On the inverse problem for finite dissipative Jacobi matrices with a rank-one imaginary part 

      Ergün, Ebru (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      This paper deals with the inverse spectral problem consisting in the reconstruction of a finite dissipative Jacobi matrix with a rank-one imaginary part from its eigenvalues. Necessary and sufficient conditions are formulated ...
    • On the limit of discrete q-Hermite I polynomials 

      Adıgüzel, Rezzan Sevinik; Turan, Mehmet; Alwhishi, Sakina (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      Bu çalışmanaın ana konusu ayrık q-Hermite I ve Hermite polinomları arasındaki limit ilişkilerini ele almaktır. Söz konusu limit durumunda ortogonal ilişkileri ve üç terim bağıntıları da sağlanmaktadır. Ayrık q-Hermite I ...
    • On the periodicity of the solution of a rational difference equation 

      Alotaibi, A. M.; Noorani, M. S. M.; El-moneam, M. A. (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, some cases on the periodicity of the rational difference equation S_{n+1}=S_{n-p}(((aS_{n-q}+bS_{n-r}+cS_{n-s})/(dS_{n-q}+eS_{ n-r}+fS_{n-s}))), are investigated, where a, b, c, d, e, f ∈(0,∞). The ...