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Journal of the Egyptian Mathematical Society

Print ISSN
1110-256X
Electronic ISSN
2090-9128
Publisher
Sciencedirect
URL
http://www.sciencedirect.com/science/journal/1110256X
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  1. On some generalizations of certain retarded nonlinear integral inequalities with iterated integrals and an application in retarded differential equation

    Journal of the Egyptian Mathematical Society 23(3):470 (2015)

    In this paper, we investigate some new nonlinear retarded integral inequalities of Gronwall–Bellman–Pachpatte type. These inequalities generalize some former famous inequalities and can be used as handy tools to study the qualitative as well as the quantitative properties of solutions ...
  2. dL-Filters of principal MS-algebras

    Journal of the Egyptian Mathematical Society 23(3):463 (2015)

    In this paper the notion of dL-filters is introduced and characterized in principal MS-algebras. Also many properties of principal dL-filters of a principal MS-algebra are observed and a characterization of the class of all principal dL-filters is given. Finally, a relationship between...
  3. Spacelike submanifolds of de-Sitter space and application of index form

    Journal of the Egyptian Mathematical Society 23(3):523 (2015)

    In this paper we develop the total umbilicity of the spacelike submanifold M of a de-Sitter space with the help of some integral formulas, index form of a nonnull geodesic and the Jacobi equation.
  4. On Akbar-Zadeh’s theorem on a Finsler space of constant curvature

    Journal of the Egyptian Mathematical Society 23(3):518 (2015)

    The aim of the present paper is to give two intrinsic generalizations of Akbar-Zadeh’s theorem on a Finsler space of constant curvature. Some consequences, of these generalizations, are drown.
  5. On the dynamics of the nonlinear rational difference equation xn+1 = Axn + Bxn−k + Cxn−l + bxn−k/dxn−k − exn−l

    Journal of the Egyptian Mathematical Society 23(3):494 (2015)

    In this article, we study the periodicity, the boundedness and the global stability of the positive solutions of the following nonlinear difference equationxn+1=Axn+Bxn-k+Cxn-l+bxn-kdxn-k-exn-l,n=0,1,2,… where the coefficients A,B,C,b,d,e∈(0,∞), while k and l are positive integers. The...
  6. [formula omitted]-Lacunary [formula omitted]-convergence of order α with [formula omitted]-metric defined by mn sequence of moduli Musielak

    Journal of the Egyptian Mathematical Society 23(3):500 (2015)

    We study some connections between μ- lacunary strong χAuv2-convergence with respect to a mn sequence of moduli Musielak and μ- lacunary χAuv2- statistical convergence, where A is a sequence of four dimensional matrices Auv=ak1,…,krℓ1,…,ℓsm1,…,mrn1,…,nsuv of complex numbers.
  7. Properties of superposition operators acting between [formula omitted] and [formula omitted]

    Journal of the Egyptian Mathematical Society 23(3):507 (2015)

    In this paper we introduce natural metrics in the hyperbolic Bloch and QK-type spaces with respect to which these spaces are complete. Moreover, Lipschitz continuous, bounded and compact superposition operators Sϕ from the hyperbolic Bloch type space to the hyperbolic QK-type space are...
  8. Author index - volume 23
    Author(s) unavailable

    Journal of the Egyptian Mathematical Society 23(3):I (2015)

  9. On generalizing covering approximation space

    Journal of the Egyptian Mathematical Society 23(3):535 (2015)

    In this paper, we present the covering rough sets based on neighborhoods by approximation operations as a new type of extended covering rough set models. In fact, we have introduced generalizations to W. Zhu approaches (Zhu, 2007). Based on the notion of neighborhood induced from any b...
  10. Some relations between power graphs and Cayley graphs

    Journal of the Egyptian Mathematical Society 23(3):457 (2015)

    Motivated by an open problem of Abawajy et al. [1] we find some relations between power graphs and Cayley graphs of finite cyclic groups. We show that the vertex deleted subgraphs of some power graphs are spanning subgraphs or equal to the complement of vertex deleted subgraphs of some...