Toplam kayıt 90, listelenen: 41-60

    • 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 ...
    • Principal functions of impulsive difference operators on semi axis 

      Erdal, İbrahim; Yardımcı, Şeyhmus (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, we investigate the continuous spectrum and resolvent operator of a second-order difference operator with an impulsive condition. Then, under certain conditions, we prove finiteness of eigenvalues, spectral ...
    • Baues cofibration for quadratic modules of Lie algebras 

      Yılmaz, Koray; Yılmaz, Elis Soylu (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper; free quadratic modules and totally free ojects in the category of quadratic modules consructed over Lie algebras. We use the free quadratic modules of Lie algebras to show that the category quadratic module ...
    • 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. ...
    • 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.
    • Approximately gamma-rings in proximal relator spaces 

      Uçkun, Mustafa (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      This article introduces approximately gamma-rings, approximately gamma- ideals and approximately gamma-rings of all descriptive approximately cosets by considering new operations on the set of all descriptive approximately ...
    • 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.
    • Portfolio selection based on a nonlinear neural network: An application on the Istanbul Stock Exchange (ISE30) 

      Dalkılıç, Türkan Erbay; Yaman, İlgım (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      Heuristic techniques have used frequently in portfolio optimization problem. However, almost none of these techniques used a neural network to allocate the proportion of stocks. The main goal of portfolio optimization ...
    • 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 ...
    • A simulation study of the Bayes estimator for parameters in Weibull distribution 

      Babacan, Esin Köksal; Kaya, Samet (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      The Weibull distribution is one of the most popular distributions in analyzing the lifetime data. In this study, we consider the Bayes estimators of the scale and shape parameters of Weibull distribution under the assumptions ...
    • 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_ ...
    • 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 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 ...
    • 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 ...
    • C-class functions on some coupled fixed point theorems in partially ordered S-metric spaces 

      Gupta, Vishal; Ansari, Arslan Hojat; Mani, Naveen (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, we prove fixed point results employing mixed weakly monotone maps, C-class functions and altering distance function in the framework of S-metric space. Here, integral application has additionally been given.
    • 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 ...
    • 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 ...
    • 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 ...
    • A new result for weighted arithmetic mean summability factors of infinite series involving almost increasing sequences 

      Yıldız, Şebnem (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, a known theorem dealing with weighted mean summability methods of non-decreasing sequences has been generalized for |A,p_{n};δ|_{k} summability factors of almost increasing sequences. Also, some new results ...
    • On two types almost (α,F_{d})-contractions on quasi metric space 

      Hançer, Hatice Arslan (Ankara Üniversitesi Fen Fakültesi, 2019-08-01)
      In this paper, first we introduce two new types almost contractions on quasi metric space named as almost (α,F_{d})-contraction of type (x) and of type (y). Then, taking into account both left and right completeness of ...