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  1. In this paper, we consider a reaction–diffusion model in population dynamics and study the impact of different types of Allee effects with logistic growth in the heterogeneous closed region. For strong Allee e...

    Authors: Kamrun Nahar Keya, Md. Kamrujjaman and Md. Shafiqul Islam
    Citation: Journal of the Egyptian Mathematical Society 2021 29:4
  2. The assessment of melting heat transfer and non-uniform heat source on magnetic Cu–H2O nanofluid flow through a porous cylinder was studied. The transformed differential equations describing the motion of Cu–H2O ...

    Authors: Khilap Singh, Alok Kumar Pandey and Manoj Kumar
    Citation: Journal of the Egyptian Mathematical Society 2021 29:1
  3. In this study, various fluid physical quantities effects such as diffusion-thermo, thermal-diffusion, thermal radiation, viscous dissipation, inclined magnetic field on unsteady MHD slip flow over a permeable ...

    Authors: T. L. Oyekunle and S. A. Agunbiade
    Citation: Journal of the Egyptian Mathematical Society 2020 28:51
  4. Weak structure space (briefly, wss) has master looks, when the whole space is not open, and these classes of subsets are not closed under arbitrary unions and finite intersections, which classify it from typical ...

    Authors: H. M. Abu-Donia and Rodyna A. Hosny
    Citation: Journal of the Egyptian Mathematical Society 2020 28:49
  5. This article gives results on fixed complete lattice L-fuzzy pre-proximities, L-fuzzy grills and L-fuzzy filters. Moreover, we investigate the relations among the L-fuzzy pre-proximities , L-fuzzy grills and L-fu...

    Authors: A. A. Ramadan, M. A. Usama and A. A. Abd El-Latif
    Citation: Journal of the Egyptian Mathematical Society 2020 28:47
  6. Rough set theory over two universes is a generalization of rough set model to find accurate approximations for uncertain concepts in information systems in which uncertainty arises from existence of interrelat...

    Authors: O. A. Embaby and Nadya A. Toumi
    Citation: Journal of the Egyptian Mathematical Society 2020 28:46
  7. In this paper, we study a multiple scales perturbation and numerical solution for vibrations analysis and control of a system which simulates the vibrations of a nonlinear composite beam model. System of secon...

    Authors: M. Sayed, A. A. Mousa, D. Y. Alzaharani, I. H. Mustafa and S. I. El-Bendary
    Citation: Journal of the Egyptian Mathematical Society 2020 28:45
  8. The main results obtained in this paper are fixed point theorems for self and non-self GF-contractions on metric spaces endowed with a graph. Our new results are generalization of recently fixed point theorems fo...

    Authors: Awais Younus, Muhammad Umer Azam and Muhammad Asif
    Citation: Journal of the Egyptian Mathematical Society 2020 28:44
  9. Let (G,∗) be a finite group and S={xG|xx−1} be a subset of G containing its non-self invertible elements. The inverse graph of G denoted by Γ(G) is a graph whose set of vertices coincides with G such that two d...

    Authors: O. Ejima, K. O. AREMU and A. Audu
    Citation: Journal of the Egyptian Mathematical Society 2020 28:43
  10. In this paper, we introduce two reliable efficient approximate methods for solving a class of fractional Lane–Emden equations with conformable fractional derivative (CL-M) which are the so-called conformable H...

    Authors: Adyan M. Malik and Osama H. Mohammed
    Citation: Journal of the Egyptian Mathematical Society 2020 28:42
  11. In this paper, new forms of nano continuous functions in terms of the notion of nano -open sets called nano -continuous functions, strongly nano -continuous functions and nano -irresolute functions will b...

    Authors: Abd El-Fattah A. El-Atik and Hanan Z. Hassan
    Citation: Journal of the Egyptian Mathematical Society 2020 28:41
  12. This article presents the study of heat transfer under the influence of mixed convective flow of Eyring-Powell fluid over a stratified stretching sheet. The impact of heat generation/absorption is also discuss...

    Authors: Muhammad Bilal and Samia Ashbar
    Citation: Journal of the Egyptian Mathematical Society 2020 28:40
  13. In this paper, some new integrals involving k gamma function and k digamma function have been established. An integral is established involving k gamma function, and its special values are discussed. Similarly, s...

    Authors: Saeed Ahmed
    Citation: Journal of the Egyptian Mathematical Society 2020 28:39
  14. In this paper, we introduce a new class of fuzzy sets, namely, fuzzy ψ*-closed sets for fuzzy topological spaces, and some of their properties have been proved. Further, we introduce fuzzy ψ*-continuous, fuzzy ψ*

    Authors: M. A. Abd Allah and A. S. Nawar
    Citation: Journal of the Egyptian Mathematical Society 2020 28:38
  15. This paper presents the searching algorithm to detect a Markovian target which moves randomly in M-cells. Our algorithm is based on maximizing the discounted effort reward search. At each fixed number of time int...

    Authors: Mohamed Abd Allah El-Hadidy
    Citation: Journal of the Egyptian Mathematical Society 2020 28:37
  16. In this paper, we defined the fuzzy upper, fuzzy lower, and fuzzy boundary sets of a rough fuzzy set λ in a fuzzy approximation space (X,R). Based on λ and R, we introduced the fuzzy ideal approximation interior ...

    Authors: Ismail Ibedou and S. E. Abbas
    Citation: Journal of the Egyptian Mathematical Society 2020 28:36
  17. A hybrid second derivative three-step method of order 7 is proposed for solving first order stiff differential equations. The complementary and main methods are generated from a single continuous scheme throug...

    Authors: O. A. Akinfenwa, R. I. Abdulganiy, B. I. Akinnukawe and S. A. Okunuga
    Citation: Journal of the Egyptian Mathematical Society 2020 28:34
  18. Investigation of the effect of slip on natural convective flow and heat transfer of a viscous incompressible fluid confined within a channel made up of a long vertical wavy wall and a parallel flat wall is car...

    Authors: J. A. Gbadeyan, J. U. Abubakar and T. L. Oyekunle
    Citation: Journal of the Egyptian Mathematical Society 2020 28:32
  19. Let A be a commutative ring with 1≠0 and R=A×A. The unit dot product graph of R is defined to be the undirected graph UD(R) with the multiplicative group of units in R, denoted by U(R), as its vertex set. Two dis...

    Authors: Dina Saleh and Nefertiti Megahed
    Citation: Journal of the Egyptian Mathematical Society 2020 28:31
  20. In this study, a new form of a quadratic spline is obtained, where the coefficients are determined explicitly by variational methods. Convergence is studied and parity conservation is demonstrated. Finally, th...

    Authors: Alberto José Ferrari, Luis Pedro Lara and Eduardo Adrian Santillan Marcus
    Citation: Journal of the Egyptian Mathematical Society 2020 28:30
  21. A new family of univariate probability distributions called the T − R {Y} power series family of probability distributions is introduced in this paper by compounding the T − R {Y} family of distributions and the ...

    Authors: Patrick Osatohanmwen, Francis O. Oyegue and Sunday M. Ogbonmwan
    Citation: Journal of the Egyptian Mathematical Society 2020 28:29
  22. Topological indices are the molecular descriptors that describe the structures of chemical compounds. They are used in isomer discrimination, structure-property relationship, and structure-activity relations. ...

    Authors: Özge Çolakoǧlu Havare
    Citation: Journal of the Egyptian Mathematical Society 2020 28:28
  23. We extend the applicability of a cubically convergent nonlinear system solver using Lipschitz continuous first-order Fréchet derivative in Banach spaces. This analysis avoids the usual application of Taylor ex...

    Authors: Debasis Sharma and Sanjaya Kumar Parhi
    Citation: Journal of the Egyptian Mathematical Society 2020 28:27
  24. Equiform geometry is considered as a generalization of the other geometries. In this paper, involute and evolute curves are studied in the case of the curve α is an equiform spacelike with a timelike equiform pri...

    Authors: A. Elsharkawy
    Citation: Journal of the Egyptian Mathematical Society 2020 28:26
  25. As a generalization of the classes of gwclosed (resp. gwopen, sgwclosed) sets in a weak structure space (X,w), the notions of ij-generalized wclosed (resp. ij-generalized wopen, ij-strongly generalized wclosed) s...

    Authors: H. M. Abu-Donia and Rodyna A. Hosny
    Citation: Journal of the Egyptian Mathematical Society 2020 28:24
  26. Reduction of attributes in an information system (IS) is a basic step for IS analysis. The original rough set model of Pawlak depends on an equivalence relation which is strongly constraints. This paper aims t...

    Authors: Abd El Fattah A. El Atik
    Citation: Journal of the Egyptian Mathematical Society 2020 28:22
  27. Investigating dynamic free vibration response of isotropic thin rectangular plate resting on two-parameter elastic foundation is of interest in the field of geotechnics, structure, highway, railway and mechani...

    Authors: Gbeminiyi M. Sobamowo, Saheed A. Salawu and Ahmed A. Yinusa
    Citation: Journal of the Egyptian Mathematical Society 2020 28:19
  28. The concept of nano near open sets was originally proposed by Thivagar and Richard (Int. J. Math. Stat. Inven 1:31-37). The main aspect of this paper is to introduce a new sort of nano near open sets namely, n...

    Authors: M. Hosny
    Citation: Journal of the Egyptian Mathematical Society 2020 28:18
  29. This article unveils the combined impact of heat generation/absorption and Joule heating on MHD flow of Ag-H2O nanofluid into a porous stretching/shrinking divergent/convergent channel with viscous dissipation an...

    Authors: Ashish Mishra, Alok Kumar Pandey, Ali J. Chamkha and Manoj Kumar
    Citation: Journal of the Egyptian Mathematical Society 2020 28:17
  30. In this paper, accelerated fitted finite difference method for solving singularly perturbed delay differential equation with non-local boundary condition is considered. To treat the non-local boundary conditio...

    Authors: Habtamu Garoma Debela and Gemechis File Duressa
    Citation: Journal of the Egyptian Mathematical Society 2020 28:16
  31. Our aim in this work is to improve the design and model of real-life applications. We put forward a standard based on m-polar fuzzy soft set decision-making criterion to examine the optimal alternative for the su...

    Authors: Mohammed M. Khalaf
    Citation: Journal of the Egyptian Mathematical Society 2020 28:15
  32. In this paper, a fluid queue driven by truncated queue with discouraged arrivals is considered. Using the efficient matrix technique, the expressions of the steady-state distribution of both the buffer content...

    Authors: Mahdy S. EL-paoumy and Taha Radwan
    Citation: Journal of the Egyptian Mathematical Society 2020 28:14
  33. There exists two different definitions for soft topological groups, the first due to Hida and the other due to Tariq Shah. In this paper, we give a generalization for both of them, and also, we study the topol...

    Authors: O. Tantawy, S. A. Kandil and A ElShamy
    Citation: Journal of the Egyptian Mathematical Society 2020 28:13
  34. In this article, a novel stochastic multi-strain tuberculosis model is presented. Numerical simulations for this model are the main aim of this work. A non-standard theta Milstein method is constructed to stud...

    Authors: Nasser H. Sweilam and Seham M. AL-Mekhlafi
    Citation: Journal of the Egyptian Mathematical Society 2020 28:12
  35. The purpose of this paper is to establish the general solution of a Volterra–Fredholm integral equation with discontinuous kernel in a Banach space. Banach’s fixed point theorem is used to prove the existence ...

    Authors: M. A. Abdou, A. A. Soliman and M. A. Abdel–Aty
    Citation: Journal of the Egyptian Mathematical Society 2020 28:11
  36. The aim of this paper is to obtain some new important consequences related to coupled coincidence points via C-class functions in the context of a regular partial ordered complete b-metric-like space (for short, ...

    Authors: Hasanen A. Hammad, Dhekra M. Albaqeri and Rashwan A. Rashwan
    Citation: Journal of the Egyptian Mathematical Society 2020 28:8
  37. The present study scrutinizes slip effects and stagnation point flows of upper-convected Maxwell fluid past a stretching sheet. The non-linear ordinary differential equations are obtained from the governing pa...

    Authors: Wubshet Ibrahim and Mekonnen Negera
    Citation: Journal of the Egyptian Mathematical Society 2020 28:7
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