Now showing items 1-20 of 126

    • 1-Dimensional Harnack Estimates 

      Duzgun, Fatma Gamze; Gianazza, Ugo; Vespri, Vincenzo (Amer Inst Mathematical Sciences-Aims, 2016)
      Let u be a non-negative super-solution to a 1-dimensional singular parabolic equation of p-Laplacian type (1 < p < 2). If u is bounded below on a time-segment {y} x (0, T] by a positive number M, then it has a power like ...
    • A Coanalytic Menger Group That Is Not Sigma-Compact 

      Tokgöz, Seçil (Scientific Technical Research Council Turkey-Tubitak, 2018)
      Under V = L we construct coanalytic topological subgroups of reals, demonstrating that even for definable groups of reals, selection principles may differ.
    • A Generalization of J - Quasipolar Rings 

      Calci, T. P.; Halicioglu, S.; Harmanci, A. (Univ Miskolc Inst Math, 2017)
      In this paper we introduce a class of quasipolar rings which is a generalization of J-quasipolar rings. Let R be a ring with identity. An element a is an element of R is called delta-quasipolar if there exists p(2) = p is ...
    • A Generalization of Projective Covers 

      Alkan, Mustafa; Nicholson, W. Keith; Ozcan, A. Cigdem (Academic Press Inc Elsevier Science, 2008)
      Let M be a left module over a ring R and I an ideal of R. We call (P, f) a projective I-cover of M if f is an epimorphism from P to M, P is projective, Ker f subset of I P, and whenever P = Ker f + X, then there exists a ...
    • A Generalization Of Rickart Modules 

      Ungor, Burcu; Halicioglu, Sait; Harmanci, Abdullah (Belgian Mathematical Soc Triomphe, 2014)
      Let R be an arbitrary ring with identity and M a right R-module with S = End(R) (M). In this paper we introduce pi-Rickart modules as a generalization of Rickart modules. pi-Rickart modules are also a dual notion of dual ...
    • A Note on Ads* Modules 

      Tütüncü, Derya Keskin (Springer Basel Ag, 2012)
      We study the ADS* modules which are the dualizations of ADS modules studied by Alahmadi et al. ( J Algebra 352: 215-222, 2012). Mainly we prove that an amply supplemented module M is ADS* if and only if M-1 and M-2 are ...
    • A Note on the Homotopy Analysis Method 

      Turkyilmazoglu, M. (Pergamon-Elsevier Science Ltd, 2010)
      The present work is devoted to using an analytic approach, namely the homotopy analysis method, to obtain convergent series solutions of strongly nonlinear problems. On the basis of the homotopy derivative concept described ...
    • A Novel Condition to the Harmonic of the Velocity Vector Field of a Curve In R-N 

      Altin, Ayse; Koroglu, Canan (Hindawi Ltd, 2017)
      In this paper, a condition is obtained for the harmonic of the velocity vector field in the curve family passing through the fixed p and q points in Rn It shows that the condition can be expressed in terms of the curvature ...
    • A Novel Traveling Wave Solution for Ostrovsky Equation Using Exp-Function Method 

      Koroglu, Canan; Ozis, Turgut (Pergamon-Elsevier Science Ltd, 2009)
      In this paper, we predict a new traveling wave solution of Ostrovsky equation by using He's Exp-function method. The method is straightforward and concise and its application shows an imminent prospective for the nonlinear ...
    • A Strong Global Attractor for the 3D Wave Equation with Displacement Dependent Damping 

      Khanmamedov, A. Kh. (Pergamon-Elsevier Science Ltd, 2010)
      We prove that if the displacement coefficient of the damping of the 3D wave equation is a positive constant on the interval (-l, l), for large enough l > 0, then this equation has a strong global attractor in H(0)(1)(Omega) ...
    • A Subclass of Analytic-Functions Defined By Using Certain Operators of Fractional Calculus 

      Altıntaş, O; Irmak, H; Srıvastava, HM (Pergamon-Elsevier Science Ltd, 1995)
      Making use of certain operators of fractional calculus, we introduce a new class F-delta(n,lambda,alpha) of functions which are analytic in the open unit disk mu and obtain a necessary and sufficient condition for a function ...
    • A Textural View of The Distinction Between Uniformities and Quasi-Uniformities 

      Ozcag, Selma; Brown, Lawrence A. (Elsevier Science Bv, 2006)
      In this paper the authors consider the interplay between di-uniformities on a texture and a complementation on that texture. It is shown that with each di-uniformity corresponds a second di-uniformity, called its complement. ...
    • Almost-Perfect Modules 

      Aydogdu, Pınar; Özcan, A. Ciğdem (Cambridge Univ Press, 2010)
      We call a module M almost perfect if every M-generated flat module is M-projective. Any perfect module is almost perfect. We characterize almost-perfect modules and investigate some of their properties. It is proved that ...
    • An Alternative Perspective on Injectivity of Modules 

      Aydogdu, Pınar; Lopez-Permouth, Sergio R. (Academic Press Inc Elsevier Science, 2011)
      Given modules M and N, M is said to be N-subinjective if for every extension K of N and every homomorphism : N M there exists a homomorphism phi : K -> M such that phi vertical bar N = phi. For a module M, the subinjectivity ...
    • An Analytic Shooting-Like Approach For The Solution of Nonlinear Boundary Value Problems 

      Türkyılmazoglu, M. (Pergamon-Elsevier Science Ltd, 2011)
      In this paper a novel approach is presented for an analytic approximate solution of nonlinear differential equations with boundary conditions. By converting the nonlinear problem into an initial value form, a shooting-like ...
    • An Asymptotic Investigation Into The Stabilization Effect Of Suction In The Rotating-Disk Boundary Layer Flow 

      Türkyılmazoğlu, M. (Pergamon-Elsevier Science Ltd, 2007)
      The suction effects in the three-dimensional boundary layer flow due to a rotating disk are analyzed from the linear stability point of view making use of the asymptotic structure of the suction mean velocity profiles of ...
    • An Extension of the Incomplete Beta Function For Negative Integers 

      Özcağ, Emin; Ege, İnci; Gürçay, Haşmet (Academic Press Inc Elsevier Science, 2008)
      The incomplete beta function B-x(a, b) is defined for a, b > 0 and 0 < x < 1. Its definition can be extended, by regularization, to negative non-integer values of a and b. In this paper we define the incomplete beta function ...
    • An Optimal Variational Iteration Method 

      Türkyılmazoğlu, M. (Pergamon-Elsevier Science Ltd, 2011)
      The variational iteration method is studied in the present work. The classical variational iteration method is improved and extended by introducing a new concept of a convergence accelerating parameter. A rigorous approach ...
    • Analytic Approximate Solutions of Parameterized Unperturbed And Singularly Perturbed Boundary Value Problems 

      Türkyılmazoglu, M. (Elsevier Science Inc, 2011)
      A novel approach is presented in this paper for approximate solution of parameterized unperturbed and singularly perturbed two-point boundary value problems. The problem is first separated into a simultaneous system regarding ...
    • Asymptotic Behaviour of a Class of Nonlinear Functional Differential Equations of Third Order 

      Tiryaki, A; Yaman, S (Pergamon-Elsevier Science Ltd, 2001)
      This paper deals with nonoscillatory behaviour of solutions of third-order nonlinear functional differential equations of the form y''' + p(t)y' + q(t)F(y(g(t))) = 0. It has been shown that under certain conditions on ...