Articles

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

On modified soft rough sets on a complete atomic Boolean lattice

Uncertainty has been used in different areas in our life such as medical diagnosis, social studies, pharmacology and others. The soft set theory and rough set theory are treated as mathematical approaches to d...

Authors: Heba I. Mustafa

Masses and thermodynamic properties of heavy mesons in the non-relativistic quark model using the Nikiforov–Uvarov method

Thermodynamic properties of heavy mesons are calculated within the framework of the N-dimensional radial Schrödinger equation. The Cornell potential is extended by including the quadratic potential plus the inver...

Authors: M. Abu-Shady, T. A. Abdel-Karim and Sh. Y. Ezz-Alarab

A group from Hackenbush game

This research presents the reader some algebraic operations related to combinatorial games and gives a detailed outlook of a special game called Hackenbush game. We will deduce a group with a special feature w...

Authors: Awad Alabdala and Essam El-Seidy

Williamson fluid flow due to a nonlinearly stretching sheet with viscous dissipation and thermal radiation

Williamson boundary layer fluid flow and heat transfer due to a nonlinearly stretching sheet is undertaken in this research. An important aspect of this study is that the thermal radiation and viscous dissipat...

Authors: Ahmed M. Megahed

Bi-univalent properties for certain class of Bazilevič functions defined by convolution and with bounded boundary rotation

In this paper, we obtain bi-univalent properties for certain class of Bazilevič functions defined by convolution and with bounded boundary rotation. We will find coefficient bounds for |a₂| and |a₃| for the class...

Authors: Mohamed K. Aouf, Samar M. Madian and Adela O. Mostafa

Periodic review inventory model for Gumbel deteriorating items when demand follows Pareto distribution

For the importance of deteriorating in units, this paper presents a Constraint Deteriorating Probabilistic Periodic Review Inventory Model (CDPPRIM), a model which is applicable under some assumptions: (1) the...

Authors: O. M. Hollah and H. A. Fergany

Nanofluids flow over a permeable unsteady stretching surface with non-uniform heat source/sink in the presence of inclined magnetic field

This work analyzes the unsteady two-dimensional nanofluid flow over a vertical stretching permeable surface in the presence of an inclined magnetic field and non-uniform heat source/sink. Four different types ...

Authors: N. S. Elgazery

A convenient category of topological partial groups

Authors: A. Fathy

On spacelike equiform-Bishop Smarandache curves on \(S_{1}^{2}\)

Authors: E. M. Solouma and W. M. Mahmoud

Balanced factor congruences of double MS-algebras

In this paper, we introduce the concepts of Stone elements, central elements and Birkhoof central elements of a double MS-algebra and study their related properties. We observe that the center C(L) of a double MS

Authors: Abd El-Mohsen Badawy

The well-posedness of stochastic Kawahara equation: fixed point argument and Fourier restriction method

In this paper, we investigate the Cauchy problem for the stochastic Kawahara equation, which is a fifth-order shallow water wave equation. We prove local well-posedness for data in ...

Authors: Abd-Allah Hyder and M. Zakarya

Generalized Jordan triple derivations associated with Hochschild 2–cocycles of rings

In the present work, we introduce the notion of a generalized Jordan triple derivation associated with a Hochschild 2–cocycle, and we prove results which imply under some conditions that every generalized Jord...

Authors: O. H. Ezzat and H. Nabiel

Complexity analysis and performance of double hashing sort algorithm

Sorting an array of n elements represents one of the leading problems in different fields of computer science such as databases, graphs, computational geometry, and bioinformatics. A large number of sorting algor...

Authors: Hazem M. Bahig

Radiative flow and heat transfer of a fluid along an expandable-stretching horizontal cylinder

The effect of thermal radiation and suction/injection on heat transfer characteristics of an unsteady expandable-stretched horizontal cylinder has been investigated. Similarity equations are obtained through t...

Authors: Tarek G. Emam

Reliability estimation under type-II censored data from the generalized Bilal distribution

The main object of this article is the estimation of the unknown population parameters and the reliability function for the generalized Bilal model under type-II censored data. Both maximum likelihood and Baye...

Authors: Ayman M. Abd-Elrahman