Journal of the Egyptian Mathematical Society

Print ISSN
1110-256X
Electronic ISSN
2090-9128
Publisher
Sciencedirect
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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...
  11. On positive braids motivated by Rossler dynamical system

    Journal of the Egyptian Mathematical Society 23(3):490 (2015)

    Rossler positive braids are defined and denoted by Rm+. We represented a general form of Rossler positive braid, and its associated permutation. For the m period Rossler positive braid Rm+, the number of crossing equals to [2(m-2)+(m-1)], and the genus g(Rm+)=(m-2), it also has a braid...
  12. Editorial Board
    Author(s) unavailable

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

  13. Translation L/W-surfaces in Euclidean 3-Space E3

    Journal of the Egyptian Mathematical Society 23(3):513 (2015)

    In this paper, we construct and obtain the necessary condition of Weingarten and linear Weingarten translation surfaces in E3. Special cases of these types are investigated and plotted.
  14. Generalized ψ∗-closed sets in bitopological spaces

    Journal of the Egyptian Mathematical Society 23(3):527 (2015)

    In this paper, we introduce and study a new class of sets in a bitopological space (X, τ1, τ2), namely, ij-ψ∗-closed sets, which settled properly in between the class of ji-α-closed sets and the class of ij-gα-closed sets. We also introduce and study new classes of spaces, namely, ij-T...
  15. Necessity and sufficiency for hypergeometric functions to be in a subclass of analytic functions

    Journal of the Egyptian Mathematical Society 23(3):476 (2015)

    The purpose of this paper is to introduce necessary and sufficient condition of (Gaussian) hypergeometric functions to be in a subclass of uniformly starlike and uniformly convex functions. Operators related to hypergeometric functions are also considered. Some of our results correct p...
  16. Contents of volume 23
    Author(s) unavailable

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

  17. The Kumaraswamy Marshal-Olkin family of distributions

    Journal of the Egyptian Mathematical Society 23(3):546 (2015)

    We introduce a new family of continuous distributions called the Kumaraswamy Marshal-Olkin generalized family of distributions. We study some mathematical properties of this family. Its density function is symmetrical, left-skewed, right-skewed and reversed-J shaped, and has constant, ...
  18. Stochastic amplitude equation for the stochastic generalized Swift–Hohenberg equation

    Journal of the Egyptian Mathematical Society 23(3):482 (2015)

    In this paper we derive rigorously the amplitude equation, using the natural separation of time-scales near a change of stability, for the stochastic generalized Swift–Hohenberg equation with quadratic and cubic nonlinearity in this formdu=-(1+∂x2)2u+νεu+γu2-u3dt+σεdW,where W(t)is a Wi...
  19. Fully developed natural convective micropolar fluid flow in a vertical channel with slip

    Journal of the Egyptian Mathematical Society 23(3):563 (2015)

    The problem of fully developed natural convective micropolar fluid flow is investigated. The slip boundary conditions for fluid velocity are applied. Non-dimensional variables are introduced. The closed form solutions of the field equations are represented graphically. As expected, it ...
  20. Finite element approach to study the behavior of fluid distribution in the dermal regions of human body due to thermal stress

    Journal of the Egyptian Mathematical Society 23(3):568 (2015)

    The human body is a complex structure where the balance of mass and heat transport in all tissues is necessary for its normal functioning. The stabilities of intracellular and extracellular fluids are important physiological factors responsible for homoeostasis. To estimate the effects...