Articles

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

Existence of cooperative search technique to find a Brownian target

This article aims to study the existence of the cooperative search technique to find a Brownian target. We have 2n cooperative searchers coordinate their search to find a Brownian target that moves on one of n di...

Authors: Mohamed Abd Allah El-Hadidy

Hall and ion slip effects on Unsteady MHD Convective Rotating flow of Nanofluids—Application in Biomedical Engineering

There is an intense worldwide activity in the development of instrumentation for medical diagnosis and bioscreening based on biological labeling and detection of nanoparticles. Based on this profound observati...

Authors: M. Veera Krishna and Ali J. Chamkha

A soft set theoretic approach to an AG-groupoid via ideal theory with applications

In this paper, we study the structural properties of a non-associative algebraic structure called an AG-groupoid by using soft set theory. We characterize a right regular class of an AG-groupoid in terms of so...

Authors: Faisal Yousafzai and Mohammed M. Khalaf

An efficient steganographic technique for hiding data

Steganography is the technique for hiding data and aims to hide data in such a way that any eavesdropper cannot observe any changes in the original media. The least significant bit (LSB) is one of the most pub...

Authors: Dalia Nashat and Loay Mamdouh

Effect of internal heat generation on free convective power-law variable temperature past a vertical plate considering exponential variable viscosity and thermal conductivity

The aim of this paper is to study the free convection boundary-layer flow with heat generation and variable fluid properties past a vertical plate. We incorporated the heat generation and variable viscosity ar...

Authors: M. Ferdows, M. G. Murtaza and MD. Shamshuddin

On conformally doubly warped product Finsler manifold

The aim of the present paper is to introduce the notion of conformally doubly warped product Finsler manifold (CDWPF). For such a Finsler manifold, the coefficients of Barthel connection and its curvature tens...

Authors: A. Soleiman and A.M. Abdelsalam

Intuitionistic fuzzy relations compatible with the group Z_n

In this paper, we define the compatibility of finite intuitionistic fuzzy relations with the group Z_n and prove some of their fundamental properties. We show that some compositions of Z_n-compatible intuitionistic...

Authors: E. G. Emam

Parameter-dependent transmission dynamics and optimal control of foot and mouth disease in a contaminated environment

The problem of foot and mouth disease (FMD) is of serious concern to the livestock sector in most nations, especially in developing countries. This paper presents the formulation and analysis of a deterministi...

Authors: Francis Mugabi, Joseph Mugisha, Betty Nannyonga, Henry Kasumba and Margaret Tusiime

Mixed convection flow of nanofluid with Hall and ion-slip effects using spectral relaxation method

In this article, the Hall and ion-slip effects on a mixed convection flow of an electrically conducting nanofluid over a stretching sheet in a permeable medium have been discussed. Using the similarity transfo...

Authors: Wubshet Ibrahim and Temesgen Anbessa

Multiset filters

A multiset is a collection of objects in which repetition of elements is essential. This paper is an attempt to generalize the notion of filters in the multiset context. In addition, many deviations between mu...

Authors: Amr Zakaria, Sunil Jacob John and K. P. Girish

Fourth-order stable central difference with Richardson extrapolation method for second-order self-adjoint singularly perturbed boundary value problems

This study introduces a stable central difference method for solving second-order self-adjoint singularly perturbed boundary value problems. First, the solution domain is discretized. Then, the derivatives in ...

Authors: Muslima Kedir Siraj, Gemechis File Duressa and Tesfaye Aga Bullo

Testing exponentiality against renewal new better than used in Laplace transform order: applications in reliability

In this paper, a new class of life distribution is proposed, named renewal new better than used in Laplace transform order (RNBUL). The test statistic for testing exponentiality versus (RNBUL) based on U-statisti...

Authors: M. A. W. Mahmoud, L. S. Diab and D. M. Radi

Flow of non-Newtonian magneto-fluid with gold and alumina nanoparticles through a non-Darcian porous medium

This paper is centered on a numerical solution of non-Newtonian Casson magneto-nanofluid flow underlying an axisymmetric surface through a non-Darcian porous medium with heat generation/absorption. Using simil...

Authors: N. S. Elgazery

Dynamics and chaos control in a discrete-time ratio-dependent Holling-Tanner model

A discrete-time Holling-Tanner model with ratio-dependent functional response is examined. We show that the system experiences a flip bifurcation and Neimark-Sacker bifurcation or both together at positive fix...

Authors: Sarker Md. Sohel Rana

Using the artificial neural networks for prediction and validating solar radiation

The main objective of this paper is to employ the artificial neural network (ANN) models for validating and predicting global solar radiation (GSR) on a horizontal surface of three Egyptian cities. The feedfor...

Authors: Zahraa E. Mohamed

Some fixed point results in fuzzy cone normed linear space

In this paper, the well known fixed point theorems of Banach, Kannan, and Chatterjee are extended to the fuzzy cone normed linear space.

Authors: Phurba Tamang and Tarapada Bag

Existence of mild solutions to semilinear fractional differential inclusion with deviated advanced nonlocal conditions

This paper is devoted to study the existence of at least one continuous mild solution to semilinear fractional differential inclusion with deviated-advanced nonlocal conditions. We develop the results obtained...

Authors: Mohamed A. E. Herzallah and Ashraf H. A. Radwan

Two-phase mixed convection nanofluid flow of a dusty tangent hyperbolic past a nonlinearly stretching sheet

A theoretical analysis for magnetohydrodynamic (MHD) mixed convection of non-Newtonian tangent hyperbolic nanofluid flow with suspension dust particles along a vertical stretching sheet is carried out. The cur...

Authors: A. Mahdy and G. A. Hoshoudy

Approximation of common solutions for a fixed point problem of asymptotically nonexpansive mapping and a generalized equilibrium problem in Hilbert space

In this paper, we introduce an iterative algorithm to approximate a common solution of a generalized equilibrium problem and a fixed point problem for an asymptotically nonexpansive mapping in a real Hilbert s...

Authors: Richard Osward, Santosh Kumar and Mengistu Goa Sangago

Fekete-Szegő inequalities for certain class of analytic functions connected with q-analogue of Bessel function

Authors: Sheza M. El-Deeb and Teodor Bulboacă

Retraction Note: On projection-invariant submodules of QTAG-modules

The Editor-in-Chief has retracted this article [1] because the results have been previously published by Danchev and Goldsmith [2]. This article is therefore redundant.

Authors: Fahad Sikander, Alveera Mehdi and Sabah A. R. K. Naji

Generalized mixed equilibrium problems and quasi- ϕ-asymptotically nonexpansive multivalued mappings in Banach spaces

In this paper, we introduce two iterative algorithms for finding a common element of the set of fixed points of a quasi- ϕ-asymptotically nonexpansive multivalued mapping and the sets of solutions of generalized ...

Authors: Bashir Ali, Lawal Umar and M. H. Harbau

On some boundary value problems with non-local and periodic conditions

In this work, we concern non-local and periodic boundary value problems. We will prove the existence of at least one solution of these problems such that the functions satisfy the growth condition. Hence, we w...

Authors: Sheren Ahmed Abd El-Salam

Solvability of initial-boundary value problem of a multiple characteristic fifth-order operator-differential equation

In this study, we establish existence-uniqueness of a vector function in appropriate Sobolev-type space for a boundary value problem of a fifth-order operator differential equation. Proper conditions are obtai...

Authors: Nashat Faried, Labib Rashed, Abdel Baset I. Ahmed and Mohamed A. Labeeb

Numerical study of thermal radiation and mass transfer effects on free convection flow over a moving vertical porous plate using cubic B-spline collocation method

In this paper, we present a numerical method based on cubic B-spline function for studying the effects of thermal radiation and mass transfer on free convection flow over a moving vertical porous plate. Simila...

Authors: M. Abu zeid, Khalid K. Ali, M. A. Shaalan and K. R. Raslan

Horosphere slab separation theorems in manifolds without conjugate points

Authors: Sameh Shenawy

Secure Hash Algorithm-2 formed on DNA

We present a new version of the Secure Hash Algorithm-2 (SHA-2) formed on artificial sequences of deoxyribonucleic acid (DNA). This article is the first attempt to present the implementation of SHA-2 using DNA...

Authors: Dieaa I. Nassr

Spectral Tau method for solving general fractional order differential equations with linear functional argument

In this paper, a numerical technique for solving new generalized fractional order differential equations with linear functional argument is presented. The spectral Tau method is extended to study this problem,...

Authors: Kamal R. Raslan, Mohamed A. Abd El salam, Khalid K. Ali and Emad M. Mohamed

A special class of regular connections in Finsler geometry

In this paper, we investigate intrinsically a special class of regular Finsler connections in the pullback formalism. Such connections are called P¹-connections. Important result concerning the nonlinear connecti...

Authors: A. Soleiman

Differential subordination applications to a class of meromorphic multivalent functions associated with Mittag-Leffler function

In this paper, using the principal of differential subordination, we obtain some properties of certain class of p-valent meromorphic functions, which are defined by Mittag-Leffler function.

Authors: Adela O. Mostafa and Ghada M. El-hawsh

Bayesian estimation of the reliability characteristic of Shanker distribution

In this study, we discussed the Bayesian property of unknown parameter and reliability characteristic of the Shanker distribution. The maximum likelihood estimate is calculated. The approximate confidence inte...

Authors: Tahani A. Abushal

On the joint distribution of order statistics from independent non-identical bivariate distributions

In this note, the exact joint probability density function (jpdf) of bivariate order statistics from independent non-identical bivariate distributions is obtained. Furthermore, this result is applied to derive th...

Authors: A. R. Omar

Fuzzy quantic nuclei and conuclei with applications to fuzzy semi-quantales and (L, M)-quasi-fuzzy topologies

The aim of this paper is to introduce and study the notions of M-fuzzy quantic nuclei and conuclei on quantales. Firstly, the concept of an M-fuzzy quantic nuclei is introduced and some of its properties are disc...

Authors: Kamal El-Saady, Saad Sharqawy and Ayat A. Temraz

Iterative algorithm for the reflexive solutions of the generalized Sylvester matrix equation

In this paper, the generalized Sylvester matrix equation AV + BW = EVF + C over reflexive matrices is considered. An iterative algorithm for obtaining reflexive solutions of this matrix equation is introduced. Wh...

Authors: Mohamed A. Ramadan, Naglaa M. El–shazly and Basem I. Selim

The new study of some characterization of canal surfaces with Weingarten and linear Weingarten types according to Bishop frame

In this paper, we have a tendency to investigate a particular Weingarten and linear Weingarten varieties of canal surfaces according to Bishop frame in Euclidean 3-space E³ satisfying some fascinating and necessa...

Authors: M. A. Soliman, W. M. Mahmoud, E. M. Solouma and M. Bary

On involute-evolute curve couple in the hyperbolic and de Sitter spaces

This paper aims at showing that Frenet apparatus of an evolute curve can be formed in terms of Frenet apparatus of its involute curve in the hyperbolic (de Sitter) space. Also, we establish relationships among Fr...

Authors: H. S. Abdel-Aziz, M. Khalifa Saad and A. A. Abdel-Salam

Separation Problem for Bi-Harmonic Differential Operators in L^p− spaces on Manifolds

Consider the bi-harmonic differential expression of the form

Authors: H. A. Atia

Complete decomposable MS-algebras

According to the characterization of decomposable MS-algebras in terms of triples (M,D,φ), where M is a de Morgan algebra, D is a distributive lattice with 1 and φ is a (0,1)-homomorphism of M into F(D), the filt...

Authors: Abd El-Mohsen Badawy and Ahmed Gaber

A novel SAT solver for the Van der Waerden numbers

This paper introduces a new efficient satisfiability problem (SAT) solver, negative-literal Van der Waerden numbers SAT solver (NegVanSAT). It is a modification of the

Authors: Munira A. Abd El-Maksoud and Areeg Abdalla

On stability of the functional equation of p-Wright affine functions in (2, α)-Banach spaces

Stability of functional equations has recent applications in many fields. We show that the stability results obtained by J. Brzdęk and concerning the functional equation of the p-Wright affine function:

Authors: El-sayed El-hady

Edge even graceful labeling of some graphs

Edge even graceful labeling is a new type of labeling since it was introduced in 2017 by Elsonbaty and Daoud (Ars Combinatoria 130:79–96, 2017). In this paper, we obtained an edge even graceful labeling for so...

Authors: Mohamed R. Zeen El Deen

On a class of generalized φ-recurrent Sasakian manifold

The object of the present paper was to introduce the notion of hyper generalized φ-recurrent Sasakian manifold and quasi generalized φ-recurrent Sasakian manifold and study its various geometric properties. The e...

Authors: Venkatesha Venkatesha, H. Aruna Kumara and Devaraja Mallesha Naik

New algorithm for calculating chromatic index of graphs and its applications

The problem of edge coloring is one of the fundamental problems in the graph theory. Graph coloring problem arises in several ways like to allocate scheduling and assignments. To follow this line of investigat...

Authors: F. Salama

Subordination and inclusion theorems for higher order derivatives of a generalized fractional differintegral operator

The main object of this paper is to investigate some subordination results of certain subclasses of multivalent analytic functions which are defined by a generalized fractional differintegral operator. Inclusi...

Authors: Hanaa M. Zayed

Estimation of initial Maclaurin coefficients of certain subclasses of bounded bi-univalent functions

In this paper, two bounded bi-univalent function subclasses were defined by using Salagean q-differential operator. The functions are defined in the open unit disc of complex plane. The main purpose is to determi...

Authors: Alaa Hassan El-Qadeem and Mohammed Ahmed Mamon