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118 research outcomes, page 2 of 12
  • publication . Article . 2020
    Open Access English
    Authors:
    Chenar Abdul Kareem Ahmed;
    Publisher: Refaad

    The concept of central RM rings is introduced in this paper as a generalization of RM rings. Since every RM ring is central RM we study the sufficient condition for a central RM ring to be a RM one. It is shown that every central reversible and hence every central symme...

  • publication . Article . 2017
    Open Access English
    Authors:
    A. Kamal; T.I. Yassen;
    Publisher: Refaad

    In this article, we study the existence of solutions of the complex linear differential equation of the form f(n) + An−1(z)f(n−1) + ... + A1(z)f0 + A0(z)f = 0, where the coefficients A0,A1,...,An are analytic functions in the unit disc. To carry out the existence of these ...

  • publication . Article . 2019
    Open Access
    Authors:
    Shadya M. Mershkhan; Baravan A. Asaad;
    Persistent Identifiers
    Publisher: Refaad for Studies and Research

    In this paper, the concepts of Pp-compact spaces by using nets, filter base and Pp-complete accumulation points are introduced and studied.

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  • publication . Article . 2017
    Open Access English
    Authors:
    Mohsen Timoumi;
    Publisher: Refaad

    Applying a Symmetric Mountain Pass Theorem, we prove the existence of infinitely many homoclinic solutions for a class of fourth-order differential equations u(4)(x) + ωu00(x) + a(x)u(x) = f(x,u(x)), ∀x ∈R where a ∈ C(R,R) may be negative on a bounded interval and F(x,u) ...

  • publication . Article . 2017
    Open Access
    Authors:
    A. El Allaoui; Said Melliani; Lalla Saadia Chadli;
    Persistent Identifiers
    Publisher: Refaad for Studies and Research

    In this paper, we generalize the definition of a fuzzy strongly continuous semigroup and its generator. We define a conformable fractional fuzzy semigroups of operators and its generator. We establish some of their properties and some results about this concept.

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  • publication . Article . 2020
    Open Access
    Authors:
    A. Amourah; O. Dalalaa; A. Alelaumi;
    Persistent Identifiers
    Publisher: Refaad for Studies and Research

    In this paper, by use of the familiar concept of neighborhoods of p−valently analytic functions, the authors show several inclusion relations associated with the (n, τ)−neighborhood of certain subclasses of analytic functions.

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  • publication . Article . 2017
    Open Access
    Authors:
    Jamal M. Mustafa;
    Persistent Identifiers
    Publisher: Refaad for Studies and Research

    In this paper, we introduce and study the new concept of binary generalized topological spaces. Also we examine some binary generalized topological properties. Furthermore, we define and study some forms of binary generalized continuous functions and we investigate the r...

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  • publication . Article . 2019
    Open Access
    Authors:
    Shahad T.Almohammadi; Cenap Ozel;
    Persistent Identifiers
    Publisher: Refaad for Studies and Research

    In this article, we will introduce the concept of rough vector spaces using upper approximation, and some algebraic results will be proven. Additionally, this concept will be combined with the concept of topological space.

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  • publication . Article . 2017
    Open Access English
    Authors:
    EL-H. Essoufi; M. Alaoui; M. Bouallala;
    Publisher: Refaad

    We consider a mathematical model describing the quasi-static process of contact between a thermo-electroviscoelastic body and a rigid foundation. The contact is described by Signorini’s conditions. The variational formulation leads to a coupled system for the displaceme...

  • publication . Article . 2017
    Open Access English
    Authors:
    A. Lesfari;
    Publisher: Refaad

    The aim of this paper is to present an overview of the active area via the spectral linearization method for solving integrable systems. New examples of integrable systems, which have been discovered, are based on the so called Lax representation of the equations of mot...

118 research outcomes, page 2 of 12