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117 research outcomes, page 4 of 12
  • 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 . 2017
    Open Access
    Authors:
    Rashida Bibi; Tooba Feroze; Azad A. Siddiqui;
    Persistent Identifiers
    Publisher: Refaad for Studies and Research

    In literature many solution of Einstein-Maxwell’s equations have been found. We consider the spherically symmetric geometry and classify the solutions of Einstein-Maxwell’s equations by considering the null/non-null electromagnetic field and isotropic/anisotropic matter ...

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  • publication . Article . 2018
    Open Access
    Authors:
    Ayman Shehata;
    Publisher: Refaad for Studies and Research

    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 . 2021
    Open Access
    Authors:
    Nechirvan Badal Ibrahim;
    Persistent Identifiers
    Publisher: Refaad for Studies and Research

    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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  • 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 . 2020
    Open Access
    Authors:
    Hariwan Fadhil M.Salih; Nechirvan Badal Ibrahim;
    Persistent Identifiers
    Publisher: Refaad for Studies and Research

    Let G = (V, E) be a simple connected undirected graph. In this paper, we define generalized the divisor sum Tk-function of a graph which is the summation of the sum of divisor k-function of the degree of the vertices of a graph denoted by Tk(G) = P v2V(G) k(deg(v)) and ...

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  • publication . Article . 2016
    Open Access English
    Authors:
    Abdo Qahis;
    Persistent Identifiers
    Publisher: Refaad

    The aim of this paper is to introduce and study the notions of µ-semicompactness and strong µ-semi-compactness in generalized topological spaces with respect to a hereditary class, called µH-semi-compactness and S-µH-semicompactness, respectively. Also several of their ...

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  • publication . Article . 2017
    Open Access
    Authors:
    Driss Harzalla;
    Persistent Identifiers
    Publisher: Refaad for Studies and Research

    In [1], the automorphism group of a binary linear code is computed by identifying it with one of its optimal generator matrices. This identification is effective for the computation of the automorphism group of a binary linear code. As application, we show in this work th...

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  • publication . Article . 2021
    Open Access English
    Authors:
    Rafik Aramyan; Daniel Yeranyan;
    Persistent Identifiers
    Publisher: Refaad

    In this article for n-dimensional convex body D the relation between the chord length distribution function and the distribution function of the distance between two random points in D was found. Also the relation between their moments was found.

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  • publication . Article . 2018
    Open Access
    Authors:
    Eskandar Ali; Ahed Hassoon;
    Persistent Identifiers
    Publisher: Refaad for Studies and Research

    In this paper, we determine when two Cayley graphs over the cyclic group Zpq2 are to be isomorphic, for p 6= q prime numbers. and we determine the all types of automorphism groups of these graphs.

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117 research outcomes, page 4 of 12