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All published articles 1763

Existence of Positive Solutions for the Kirchhoff Type Equations Involving General Critical Growth in \(\mathbb{R}\)\(^{N}\)

Ting Xiao & Qiongfen Zhang · Journal of Advances in Mathematics and Computer Science · 2021

In this paper, we consider the following nonlinear Kirchhoff type problem − ( a + \(\lambda\) \(\int\) \(\mathbb{R}\)\(^{N}\) |∇u|2dx ) Δu + V (x)u = f(u), x ∈ \(\mathbb{R}\)\(^{N}\), where N ≥ 3, a is a positive constant, \(\lambda\) \(\ge\) 0 is a parameter. Under some sufficie...

Open access Research Article 10.9734/jamcs/2021/v36i1230427

Global Existence for Compressible Euler Equations with Damping in Partial Space-Period Domains

Jintao Li · Journal of Advances in Mathematics and Computer Science · 2021

In this paper, we are concerned with the global existence of solutions to isentropic compressible Euler equations with damping in partial space-period domains. Based on the uniform energy estimates, we obtain the global existence for any spatial dimension if the initial data is s...

Open access Research Article 10.9734/jamcs/2021/v36i1230423

The Energy of Conjugate Graph of a Dihedral Group

M. S. Mahmud, Pokalas P. Tal, M. Z. Idris & A. A. Malle · Journal of Advances in Mathematics and Computer Science · 2021

Let \(\Gamma_{D_{2 n}}^{C}\) and \(E(\Gamma)\) denote the conjugate graph of a dihedral group of order \(2 n(n \in \aleph)\) and the energy of a graph respectively. The sum of the absolute values of the eigenvalues of an adjacency matrix's eigenvalues is the energy of a graph. In...

Open access Research Article 10.9734/jamcs/2021/v36i1230424

Modelling Dynamic Behaviour of Out-Patient Department Visits at the University of Cape Coast Hospital Using Time Series Analysis

M. A. Bakr, J. K. Prah, K. S. Nkrumah & T. Tamag · Journal of Advances in Mathematics and Computer Science · 2021

Background: Accurate and reliable forecasting of outpatient department visits enhances decision-making and planning for future healthcare demands and is the foundation for greater and better utilization of healthcare resources and increased levels of outpatient care and satisfact...

Open access Research Article 10.9734/jamcs/2021/v36i1230422

Existence and Uniqueness of almost Non-Negative Periodic Solution for a Class of Generalized Sine-Gordon Equation

Jianze Chen · Journal of Advances in Mathematics and Computer Science · 2021

In this paper, we have proved the existence and uniqueness of almost non-negative periodic solution to a class of generalized Sine-Gordon equation. The main method used is the maximum principle of telegraph equation established by Mawhin, Ortega and Robles-Pérez. The main techniq...

Open access Research Article 10.9734/jamcs/2021/v36i1130419

Generalized Exponential Poisson Geometric Distribution using Marshall-Olkin Technique

M. M. E. Abd El-Monsef, N. M. Sohsah & W. A. Hassanein · Journal of Advances in Mathematics and Computer Science · 2021

A new continuous distribution is generated by using Marshall Olkin method; it is probability function has been generated also distribution function. Reliability function and hazard function. The proposed called geometric Poisson exponential distribution (GEPGD). some of it is pro...

Open access Research Article 10.9734/jamcs/2021/v36i1130418

The Relations between Some Families of Copulas

M. M. E. Abd El-Monsef, S. M. Elsobky & M. M. Seyam · Journal of Advances in Mathematics and Computer Science · 2021

Copulas are mathematical objects that fully capture the dependence structure among random variables and thus offer a great deal of flexibility in building multivariate stochastic models. They have widely use in, credit models, risk aggregation, portfolio selection, insurance, and...

Open access Research Article 10.9734/jamcs/2021/v36i1130417

A Dual Method of Carroll's Generalized Canonical Correlation Analysis

Rodnellin Onesime Malouata, Gelin Chedly Louzayadio, Michel Koukouatikissa Diafouka & Leonard Niere · Journal of Advances in Mathematics and Computer Science · 2021

Aims/Objectives: We propose a dual method of Carroll's generalized canonical correlation analysis and we prove by means of the proposed criterion that the duality is formulated by exchanging the operators. It is an extension of Carroll's generalized canonical correlation analysis...

Open access Research Article 10.9734/jamcs/2021/v36i1130414

An Inventory Analysis for Deteriorating Items Incorporating the Effect of Preservation Technology Investment When Demand is Time Dependent

M. A. Rahman & M. H. Rashid · Journal of Advances in Mathematics and Computer Science · 2021

The goal of this work is to characterize preservation technique for deteriorating items in order to lessen the rate of deterioration. This study looks at a degrading inventory model with time-dependent demand that is a quadratic function of time. The rate of degradation in this m...

Open access Research Article 10.9734/jamcs/2021/v36i1130413

On the Convergence and Stability of Finite Difference Method for Parabolic Partial Differential Equations

B. J. Omowo, I. O. Longe, C. E. Abhulimen & H. K. Oduwole · Journal of Advances in Mathematics and Computer Science · 2021

In this paper, we verify the convergence and stability of implicit (modified) finite difference scheme. Knowing fully that consistency and stability are very important criteria for convergence, we have prove the stability of the modied implicit scheme using the von Newmann method...

Open access Research Article 10.9734/jamcs/2021/v36i1030412

Methods for Deriving Linearly Independent Solutions of the Differential Equation with Repeated Roots

Jikang Bai · Journal of Advances in Mathematics and Computer Science · 2021

When the eigenvalue \(\lambda\) of a higher order homogeneous linear differential equation with constant coecients is the repeated root of multiplicity \(k\), the differential equation has exactly \(k\) linearly independent solutions. Different textbooks often use different ways...

Open access Research Article 10.9734/jamcs/2021/v36i1030411

Probability Density Functions for Prediction Using Normal and Exponential Distribution

Kunio Takezawa · Journal of Advances in Mathematics and Computer Science · 2021

When data are found to be realizations of a specific distribution, constructing the probability density function based on this distribution may not lead to the best prediction result. In this study, numerical simulations are conducted using data that follow a normal distribution,...

Open access Research Article 10.9734/jamcs/2021/v36i1030410

Pressure-Velocity Coupling Schemes for Bouyancy Driven Flow in a Differentially Heated Cavity Using F.V.M and Matlab

Purity Mberia, Stephen Karanja & Mark Kimathi · Journal of Advances in Mathematics and Computer Science · 2021

Numerical analysis of fluid flow is anchored on the laws of conservation. A challenge in solving the momentum equation arises due to the unavailability of an explicit pressure equation. To avoid solving the pressure term most researchers have eliminated it by cross differentiatin...

Open access Research Article 10.9734/jamcs/2021/v36i1030409