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119 research outcomes, page 1 of 12
  • publication . Article . 2017
    Open Access English
    Authors:
    A.A.Azamov;
    Publisher: Refaad

    It is suggested several lower estimations for the determinants of matrices consisting of elements +1 and −1, improving the known Hadamard’s lower estimation

  • publication . Article . 2017
    Open Access English
    Authors:
    Karwan Hama Faraj Jwamer; Bzhar Jamal;
    Publisher: Refaad

    In this paper, a quadratic B-Spline has been constructed that is an approximate solution to a function with very limited given lacunary data and approximate boundary conditions. Then the error bound for the B-spline is found. Further this construction is used to solve b...

  • publication . Article . 2017
    Open Access English
    Authors:
    O. Bazighifan;
    Publisher: Refaad

    This paper is concerned with asymptotic and oscillatory properties of the nonlinear higher-order differential equation with delay argument. Some examples are given to illustrate our main result

  • publication . Article . 2017
    Open Access English
    Authors:
    Nourddin Saidou;
    Publisher: Refaad

    In this paper we will establish a new relationship between differentiability and optimization of convex functions. We consider convex lower semi continuous functions in Banach spaces and we characterize respectively the relation between Fr´echet (Gaˆteaux) differentiabili...

  • publication . Article . 2020
    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 . 2017
    Open Access English
    Authors:
    Md. Yasin Ali; Kanak Ray Chowdhury; Abeda Sultana; Nirmal Kanti Mitra;
    Publisher: Refaad

    In this paper, using “belongingness (∈) ” and quasi-coincidence (q) ” of fuzzy points and" fuzzy sets, the concept of (∈, ∈ ∨q) -fuzzy hemirings and (∈¯, ∈ ∨¯ ¯q) -fuzzy hemirings have been introduced and some of its properties have been investigate

  • publication . Article . 2017
    Open Access English
    Authors:
    K.Hilal; Y. Allaoui;
    Publisher: Refaad

    In this work we define the solution of the fractional neutral impulsive differential equation with infinite delay. The results of existence are obtained by using the Banach contraction and Schafer fixed point. Some proprieties of probability density functions and semi-group...

  • publication . Article . 2020
    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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  • publication . Article . 2016
    Open Access English
    Authors:
    Ekrem SAVAS;
    Persistent Identifiers
    Publisher: Refaad

    The purpose of this paper is to introduce and study Iλ - statistical convergence of order α in topological groups and we shall also present some inclusion theorems

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  • publication . Article . 2020
    Open Access English
    Authors:
    Hussein Ageel Khatab; Salah Gazi Shareef;
    Persistent Identifiers
    Publisher: Refaad

    In this paper, we propose a new conjugate gradient method for solving nonlinear unconstrained optimization. The new method consists of three parts, the first part of them is the parameter of Hestenes-Stiefel (HS). The proposed method is satisfying the descent condition,...

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119 research outcomes, page 1 of 12