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129 research outcomes, page 5 of 13
  • publication . Article . 2021
    Open Access
    Authors:
    Rafik Aramyan; Daniel Yeranyan;
    Persistent Identifiers
    Publisher: Refaad for Studies and Research

    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 . Other literature type . 2019
    Open Access
    Authors:
    Mohamed I. Riffi;
    Publisher: Refaad for Studies and Research

    This paper considers the distributions of spacings between successive order statistics corresponding to a random sample from a two-parameter Gompertz distribution. Closed-form formulas for the probability density functions of the spacings and their moments are given in ...

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  • publication . Article . 2018
    Open Access English
    Authors:
    Eskandar Ali; Ahed Hassoon;
    Persistent Identifiers
    Publisher: Refaad

    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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  • publication . Article . 2016
    Open Access English
    Authors:
    Mourad Dilmi; Hamid Benseridi;
    Persistent Identifiers
    Publisher: Refaad

    In this paper we consider the nonlinear boundary value problem governed by a stationary perturbed Stokes system with mixed boundary conditions ( Dirichlet-Fourier- maximal monotone graph), in a smooth domain. The existence and regularity of the weak solution to this pro...

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  • publication . Article . 2019
    Open Access English
    Authors:
    Atta A. K. Abu Hany; Mohammed S. El-Khatib; Abbas K. Shourrab;
    Persistent Identifiers
    Publisher: Refaad

    We focus our attention in this article on some recent results regarding Hardy-Hilbert’s inequalities. We derive an equivalent form using katugampola Fractional Calculus and introduce new analogs to some Hardy-Hilbert’s type inequality. Several special cases are also giv...

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  • publication . Article . 2021
    Open Access English
    Authors:
    Ogoke Uchenna Petronilla;
    Publisher: Refaad

    This research is unlike many others in that the concept of the nested design is applied in the medical science as against the trend in the agricultural and social sciences. In this research, we consider a three-stage (2 × 5 × 2) nested design with the factors being Hosp...

  • publication . Article . 2019
    Open Access English
    Authors:
    Mohamed Elarabi Benattia; Kacem Belghaba;
    Persistent Identifiers
    Publisher: Refaad

    In this work , we investigate the Aboodh transformation method to solve first order constant coefficients complex equations. This method provides an effective and efficient way of solving a wide range of linear operator equations.

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  • publication . Article . 2018
    Open Access English
    Authors:
    P C Jackreece; C. A. Godspower; H. C. Ugorji;
    Persistent Identifiers
    Publisher: Refaad

    In this study, controllability of a class of fractional-order dynamical system with time-varying delays is considered. First, a representation of the solution is given using Laplace transform and Mittageleffler function. Then necessary and sufficient conditions for the ...

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  • publication . Article . 2017
    Open Access English
    Authors:
    Maher Nazmi Qarawani;
    Persistent Identifiers
    Publisher: Refaad

    In this paper we establish Hyers-Ulam-Rassias stability and Hyers-Ulam Criteria for second order non-linear ordinary differential equations of Lane-Emden type; moreover two examples of such equations are considered

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  • publication . Article . 2020
    Open Access
    Authors:
    Sadeq Taha Abdulazeez; Sizar Abid Mohammed; Mehmut Modanli;
    Persistent Identifiers
    Publisher: Refaad for Studies and Research

    Inthisarticle,wewilldiscusstheapplicationoftheLyapunov’ssecondmethodandfixedpointtheoriestocertaindifferential equations of first and second order. First, we will introduce some basic information about these subjects, and later, we give their applications concerning some ...

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129 research outcomes, page 5 of 13