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76 research outcomes, page 3 of 8
  • 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...

  • In this article, we have presented a variable step finite difference method for solving second order boundary value problems in ordinary differential equations with an internal boundary condition. We have discussed the convergence and established at least cubic order of ac...

  • publication . Article . 2018
    Open Access English
    Authors:
    Rauhi I. Elkhatib;
    Publisher: Refaad

    The group G ̅=2^5:SL(5,2) is a maximal subgroup of the special linear group SL(6,2) of index 2016. This Group has two inertia factor groups namely, SL(5,2) and 2^4:SL(4,2) of indices 1 and 31 respectively in SL(5, 2). The aim of this paper is to construct the Fischer-Cl...

  • publication . Article . 2021
    Open Access English
    Authors:
    Mohammed S. El-Khatib; Tariq O. Salim; Atta A. K. Abu Hany;
    Persistent Identifiers
    Publisher: Refaad

    The aim of this article is to introduce a new form for the Laplace transform. This new definition will be considered as one of the generalizations of the usual (classical) Laplace transform. We employ the new ”Katugampola derivative”, which obeys classical properties an...

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  • publication . Article . 2020
    Open Access English
    Authors:
    Nawel Abdesselam;
    Persistent Identifiers
    Publisher: Refaad

    In this paper, the boundary stabilization of Schr¨odinger equations with variable coefficients by nonlinear and memory feedback is considered. The approch adopted uses Riemannian geometry methods and multipliers techniques.©2020 All rights reserved.

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  • publication . Article . 2019
    Open Access English
    Authors:
    Zanyar A. Ameen; Baravan A. Asaad;
    Persistent Identifiers
    Publisher: Refaad

    Recently, new types of (open) sets have been studied by some topologists. This note shows that these sets are identical to some other sets already exist in the literature.

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  • publication . Article . 2018
    Open Access English
    Authors:
    Ayman Shehata;
    Publisher: Refaad

    The main object of this present paper is to introduce an extended family of Laguerre matrix polynomials and to derive a new class of certain summation formulas with the help of the Lie algebra method using techniques.

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  • publication . Article . 2017
    Open Access English
    Authors:
    Mohamed Elarabi Benattia; Belghaba Kacem;
    Publisher: Refaad

    In this paper, we are interested to develop a numerical method based on the Chebyshev wavelets for solving fractional order differential equations (FDEs). As a result of the presentation of Chebyshev wavelets, we highlight the operational matrix of the fractional order d...

  • publication . Article . 2021
    Open Access English
    Authors:
    Nechirvan Badal Ibrahim;
    Persistent Identifiers
    Publisher: Refaad

    In this paper, we define a new concept in theory of graph energy called coneighbor energy of a graph G, denoted by CE(G), as the sum of the absolute value of eigenvalues of its coneighbor matrix. We are going to derive some results about the coneighbor energy of graphs ...

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76 research outcomes, page 3 of 8