Open Journal of mathematical Sciences (OMS)

Open Journal of Mathematical Sciences (OMS) 2523-0212 (online) 2616-4906 (Print) partially supported by National Mathematical Society of Pakistan is a single blind peer reviewed Open Access journal that publishes original research articles, review articles and survey articles related to Mathematics. Open access means that articles published in Open Journal of Mathematical Sciences are available online to the reader “without financial, legal, or technical barriers”. We publish both in print and online versions. Accepted paper will be published online immediately after it gets ready to publish. We publish one volume in the month of December in print form.

Latest Published Articles

Author(s): Joaquín Luna-Torres1
1Programa de Matemáticas, Universidad Distrital Francisco José de Caldas, Bogotá D. C., Colombia
Abstract:
We construct the concrete categories \(\mathbf{I\text{-}Loc}\) and \(\mathbf{\mathfrak h\text{-}Loc}\) over the category \(\mathbf{Loc}\) of locales and we deduce that they are topological categories, where \(\mathbf I\) and \(\mathfrak h\) denote respectively the classes of interior and \(h\) operators of the category \(\mathbf{Loc}\) of locales.
Author(s): Tristram de Piro1
1Mathematical Institute, University of Oxford, Andrew Wiles Building, Radcliffe Observatory Quarter (550), Woodstock Road, Oxford, OX2 6GG, England
Abstract:
We consider Gibbs’ definition of chemical equilibrium and connect it with dynamic equilibrium, in terms of no substance formed. We determine the activity coefficient as a function of temperature and pressure, in reactions with or without interaction of a solvent, incorporating the error terms from Raoult’s Law and Henry’s Law, if necessary. We compute the maximal reaction paths and apply the results to electrochemistry, using the Nernst equation.
Author(s): Abd Raouf Chouikha1
14, Cour des Quesblais 35430 Saint-Pere, France
Abstract:
In this paper, we interested in Wilker inequalities. We provide finer bounds than known previous. Moreover, bounds are obtained for the following trigonometric function
\[g_n(x) = \left(\frac{\sin(x)}{x}\right)^2 \left( 1 – \frac{2\left(\frac{2 x}{\pi}\right)^{2n+2}}{1-(\frac{2x}{\pi})^2}\right) +\frac{\tan(x)}{x}, \ n\geq 0.\]
Author(s): Md. Nur Alam1
1Department of Mathematics, Pabna University of Science & Technology, Pabna-6600, Bangladesh
Abstract:

In this investigation, we aim to investigate the novel exact solutions of nonlinear partial differential equations (NLPDEs) arising in electrical engineering via the -expansion method. New acquired solutions are kink, particular kink, bright, dark, periodic combined-dark bright and combined-dark singular solitons, and hyperbolic functions solutions. The achieved distinct types of solitons solutions contain critical applications in engineering and physics. Numerous novel structures (3D, contour, and density plots) are also designed by taking the appropriate values of involved parameters. These solutions express the wave show of the governing models, actually.

Author(s): Nechirvan Badal Ibrahim1, Hariwan Fadhil M. Salih2, Shadya Merkhan Mershkhan2
1Department of Mathematics, College of Science, University of Duhok, Iraq.
2Department of Mathematics, Faculty of Science, University of Zakho, Iraq.
Abstract:
In this work, generalized Euler’s \(\Phi_w\)-function of edge weighted graphs is defined which consists of the sum of the Euler’s \(\varphi\)-function of the weight of edges of a graph and we denote it by \(\Phi_w(G)\) and the general form of Euler’s \(\Phi_w\)-function of some standard edge weighted graphs is determined. Also, we define the divisor sum \(T_{k_w}\)-function \(T_{k_w}(G)\) of the graph \(G\), which is counting the sum of the sum of the positive divisor \(\sigma_k\)-function for the weighted of edges of a graph \(G\). It is determined a relation between generalized Euler’s \(\Phi_w\)-function and generalized divisor sum \(T_{k_w}\)-function of edge weighted graphs.
Author(s): AbdulAzeez Kayode Jimoh1, Adebayo Olusegun Adewumi2
1Department of Mathematics and Statistics, Faculty of Pure and Applied Sciences, Kwara State University, Malete, Nigeria.
2Department of Mathematics, Faculty of Pure and Applied Sciences, Obafemi Awolowo University, Ile-Ife, Nigeria.
Abstract:

A continuous two-step block method with two hybrid points for the numerical solution of first order ordinary differential equations is proposed. The approximate solution in form of power series and its first ordered derivative are respectively interpolated at the point \(x=0\) and collocated at equally spaced points in the interval of consideration. The application of the method involves using the main scheme derived together with the additional schemes simultaneously to obtain the solution to the problem at the grid points. The analysis of the method and the results obtained from the examples considered show that the method is consistent, zero-stable, convergent and of high accuracy.

Author(s): Muhammad Abubakar Isah1, Asif Yokus2
1Department of Mathematics, Faculty of Science, Firat University, Elazig, Turkey.
2 Department of Mathematics, Faculty of Science, Firat University, Elazig, Turkey.
Abstract:

In this paper, we use the \(\varphi ^{6}\)-model expansion method to construct the traveling wave solutions for the reaction-diffusion equation. The method of \(\varphi ^{6}\)-model expansion enables the explicit retrieval of a wide variety of solution types, such as bright, singular, periodic, and combined singular soliton solutions. Kink-type solitons, also known as topological solitons in the context of water waves, are another type of solution that can be explicitly retrieved. This study’s results might enhance the equation’s nonlinear dynamical properties. The method proposes a practical and efficient method for solving a sizable class of nonlinear partial differential equations. The dynamical features of the data are explained and highlighted using exciting graphs.

Author(s): V. S. Subha1, P. Dhanalakshmi2
1Post Graduate and Research Department of Mathematics, Government Arts College, C. Mutlur, Tamilnadu-608102, India.
2CKNC College for Women, Cuddalore, Tamilnadu-607001, India.
Abstract:

In this paper, we introduce the notion of interval neutrosophic ideals in subtraction algebras. Also, introduce the intersection and union of interval neutrosophic sets in subtraction algebras. We prove intersection of two-interval neutrosophic ideals is also an interval neutrosophic ideal. Some exciting properties and results based on such an ideal are discussed. Moreover, we define the homomorphism and homomorphism of interval neutrosophic sets. We prove the image of an interval neutrosophic subalgebra is also an interval neutrosophic sub-algebra.

Author(s): Howard S. Cohl1, Roberto S. Costas-Santos2, Philbert R. Hwang3, Tanay V. Wakhare4
1Applied and Computational Mathematics Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
2Departamento de Métodos Cuantitativos, Universidad Loyola Andalucía, E-41704, Dos Hermanas, Seville, Spain.
3Card Technology Department, Capital One Financial Corporation, McLean, VA 22102, USA.
4Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Abstract:

We derive generalized generating functions for basic hypergeometric orthogonal polynomials by applying connection relations with one extra free parameter to them. In particular, we generalize generating functions for the continuous \(q\)-ultraspherical/Rogers, little \(q\)-Laguerre/Wall, and \(q\)-Laguerre polynomials. Depending on what type of orthogonality these polynomials satisfy, we derive corresponding definite integrals, infinite series, bilateral infinite series, and \(q\)-integrals.

Author(s): Tristram de Piro 1
1Mathematical Institute, University of Oxford, Andrew Wiles Building, Radcliffe Observatory Quarter (550), Woodstock Road, Oxford, OX2 6GG, England.
Abstract:

We prove that if the frame \(S\) is decaying surface non-radiating, in the sense of Definition 1, then if \(\left(\rho,\overline{J}\right)\) is analytic, either \(\rho=0\) and \(\overline{J}=\overline{0}\), or \(S\) is non-radiating, in the sense of [1]. In particularly, by the result there, the charge and current satisfy certain wave equations in all the frames \(S_{\overline{v}}\) connected to \(S\) by a real velocity vector \(\overline{v}\), with \(|\overline{v}|<c\).