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76 research outcomes, page 1 of 8
  • 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 . 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 . 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 . 2021
    Open Access English
    Authors:
    Moulay Rchid Sidi Ammi; Mostafa Tahiri;
    Publisher: Refaad

    Fractional calculus has been widely used in mathematical modeling of evolutionary systems with memory effect on dynamics. In order to illustrate the efficiency of this non-integer order calculus, we employ SEIR models to model the dynamics, with and without memory, of t...

  • 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 . 2021
    Open Access English
    Authors:
    Moulay Rchid Sidi Ammi; Ibrahim Dahi;
    Publisher: Refaad

    In this work, we study the Poincare inequality in Sobolev spaces with variable exponent. As a consequence of this ´ result we show the equivalent norms over such cones. The approach we adopt in this work avoids the difficulty arising from the possible lack of density of...

  • publication . Article . 2021
    Open Access English
    Authors:
    Moulay Rchid Sidi Ammi; Mostafa Tahiri; Delfim F. M. Torres;
    Publisher: Refaad

    In this paper, we study an epidemic model with Atangana-Baleanu-Caputo fractional derivative. We obtain a special solution using an iterative scheme via Laplace transformation. Uniqueness and existence of a solution using the Banach fixed point theorem are studied. A de...

76 research outcomes, page 1 of 8