Articles

The periodic rotary motions of a rigid body in a new domain of angular velocity

In the previous works, the limiting case for the motion of a rigid body about a fixed point in a Newtonian force field, which comes from a gravity center lies on Z-axis, is solved. The authors apply the small par...

Authors: A. I. Ismail

Melting heat transfer assessment on magnetic nanofluid flow past a porous stretching cylinder

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

Diffusion-thermo and thermal-diffusion effects with inclined magnetic field on unsteady MHD slip flow over a permeable vertical plate

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

Sensitivity and mathematical model analysis on secondhand smoking tobacco

Authors: Birliew Fekede and Benyam Mebrate

On \(\psi _{{\mathcal{H}}}( . )\)-operator in weak structure spaces with hereditary classes

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

An asymptotic model for solving mixed integral equation in some domains

Authors: Mohamed Abdella Abdou and Hamed Kamal Awad

L-fuzzy pre-proximities, L-fuzzy filters and L-fuzzy grills

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

Multiset concepts in two-universe approximation spaces

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

Bifurcation analysis of a composite cantilever beam via 1:3 internal resonance

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

Fixed point theorems for self and non-self F-contractions in metric spaces endowed with a graph

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

Energy of inverse graphs of dihedral and symmetric groups

Let (G,∗) be a finite group and S={x∈G|x≠x⁻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

Two efficient methods for solving fractional Lane–Emden equations with conformable fractional derivative

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

Some nano topological structures via ideals and graphs

In this paper, new forms of nano continuous functions in terms of the notion of nano Iα-open sets called nano Iα-continuous functions, strongly nano Iα-continuous functions and nano Iα-irresolute functions will b...

Authors: Abd El-Fattah A. El-Atik and Hanan Z. Hassan

Flow and heat transfer analysis of Eyring-Powell fluid over stratified sheet with mixed convection

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

Some integrals involving k gamma and k digamma function

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

ψ*-closed sets in fuzzy topological spaces

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

The searching algorithm for detecting a Markovian target based on maximizing the discounted effort reward search

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

Fuzzy rough sets with a fuzzy ideal

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

Analysis of the finiteness for the first collision time between two randomly moving particles

The finiteness of the collision time between two different randomly moving particles is presented by providing more useful analysis that gives stronger and finite moment. The triangular arrays and the uniform ...

Authors: Alaa A. Alzulaibani

Seventh order hybrid block method for solution of first order stiff systems of initial value problems

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

Application of a subordination theorem associated with certain new generalized subclasses of analytic and univalent functions

The prime focus of the present work is to investigate some fascinating relations of some analytic and univalent functions using a subordination theorem.

Authors: J. O. Hamzat and R. M. El-Ashwah

Effects of Navier slip on a steady flow of an incompressible viscous fluid confined within spirally enhanced channel

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

Dot product graphs and domination number

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

Convergence analysis and parity conservation of a new form of a quadratic explicit spline with applications to integral equations

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

The T–R {Y} power series family of probability distributions

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

On the inverse sum indeg index of some graph operations

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

Extending the applicability of a third-order scheme with Lipschitz and Hölder continuous derivative in Banach spaces

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

Generalized involute and evolute curves of equiform spacelike curves with a timelike equiform principal normal in \(E_{1}^{3}\)

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

Further results on Parity Combination Cordial Labeling

Authors: Mohamed Seoud and Mohamed Aboshady

Generalized wclosed sets in biweak structure spaces

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

New traveling wave solutions of MHD micropolar fluid in porous medium

This paper aims to determine the exact solutions of non-Newtonian fluid namely micropolar fluid with MHD in a porous medium by traveling wave method. The governing equations of incompressible micropolar fluid ...

Authors: Muhammad Jamil and Arsalan Ahmed

Reduction based on similarity and decision-making

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

Further results on edge even graceful labeling of the join of two graphs

In this paper, we investigated the edge even graceful labeling property of the join of two graphs. A function f is called an edge even graceful labeling of a graph G=(V(G),E(G)) with p=|V(G)| vertices and q=|E(G)...

Authors: Mohamed R. Zeen El Deen and Nora A. Omar

General-type proximal point algorithm for solving inclusion and fixed point problems with composite operators

The main purpose of this paper is to introduce a new general-type proximal point algorithm for finding a common element of the set of solutions of monotone inclusion problem, the set of minimizers of a convex ...

Authors: T. M. M. Sow

Application of Adomian decomposition method to free vibration analysis of thin isotropic rectangular plates submerged in fluid

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

Nano ∧_β-sets and nano ∧_β-continuity

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

Roles of nanoparticles and heat generation/absorption on MHD flow of Ag–H₂O nanofluid via porous stretching/shrinking convergent/divergent channel

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

Accelerated fitted operator finite difference method for singularly perturbed delay differential equations with non-local boundary condition

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

Optimal alternative for suitability of S-boxes to image encryption based on m-polar fuzzy soft set decision-making criterion

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

A matrix approach for stationary analysis fluid model driven by an M/M/1/N queue with discouraged arrivals

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

Generalization of soft topological groups

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

Nonstandard theta Milstein method for solving stochastic multi-strain tuberculosis model

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

On a discussion of Volterra–Fredholm integral equation with discontinuous kernel

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

Bivariate general exponential models with stress-strength reliability application

In this paper, we introduce two families of general bivariate distributions. We refer to these families as general bivariate exponential family and general bivariate inverse exponential family. Many bivariate ...

Authors: S. K. khames and N. A. Mokhlis

Coupled coincidence point technique and its application for solving nonlinear integral equations in RPOCbML spaces

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

MHD slip flow of upper-convected Maxwell nanofluid over a stretching sheet with chemical reaction

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

On the perturbation analysis of the maximal solution for the matrix equation \( X-\overset{m}{\sum \limits_{i=1}}{A}_i^{\ast}\kern0.1em {X}^{-1}\kern0.1em {A}_i+\sum \limits_{j=1}^n{B}_j^{\ast}\kern0.1em {X}^{-1}\kern0.1em {B}_j=I \)

Authors: Mohamed A. Ramadan and Naglaa M. El–Shazly

Approximations of some near open sets in ideal topological spaces

In this paper, we introduce the concepts of j-ideal lower and j-ideal upper approximations as a generalization of approximation by Pawlak by using j-ideal open sets where j ∈ {α, S, P, γ, β, ⋀_β}. Some of their ba...

Authors: A. S. Nawar

Self adaptive spectral conjugate gradient method for solving nonlinear monotone equations

In this paper, we propose a self adaptive spectral conjugate gradient-based projection method for systems of nonlinear monotone equations. Based on its modest memory requirement and its efficiency, the method ...

Authors: M. Koorapetse and P. Kaelo

An algorithm for solving the bi-objective median path-shaped facility on a tree network

In this paper, an algorithm for the bi-objective median path (BMP) problem on a tree network is considered. The algorithm is based on the two-phase method which can compute all Pareto solutions for the BMP pro...

Authors: Abdallah Aboutahoun and Fatma El-Safty