African Journal of
Mathematics and Computer Science Research

  • Abbreviation: Afr. J. Math. Comput. Sci. Res.
  • Language: English
  • ISSN: 2006-9731
  • DOI: 10.5897/AJMCSR
  • Start Year: 2008

AJMCSR Articles in press

Article in Press

Total Revenue Function for Non Regular Fixed Lifetime Inventory System.

The fixed lifetime inventory system assumes that outdated items are discarded from inventory. Such inventory system are here refered to as regular inventory system. The non-regular fixed lifetime inventory system assume that outdated items are not discarded from inventory. The features of both the regular and non-regular inventory systems are compared in this work and the total revenue function for the non-regular fixed...

Author(s): Izevbizua . O and Apanapudor. J.S

Article in Press

A Short Note on Inequalities of Interval-valued Intuitionistic Fuzzy Matrices

In this paper, we study and prove some results related to inequalities of interval-valued intuitionistic fuzzy matrices with respect to algebraic sum and algebraic product.

Author(s):Somen Debnath

Article in Press

An Air Quality Composite Index Based on Pollutant Concentration Factor Analysis

o overcome the problems of Air Quality Index in describing regional short-term air quality status and changing trend, based on the daily average concentrations of six air pollutants affecting regional air quality in Zhengzhou from 2015 to 2018, this paper analyzes their correlation characteristics, and defines an air quality composite index instead of the original index by using factor analysis method, which not only...

Author(s):Kai-guang ZHANG , Ming-ting BA, Hong-ling MENG, Yan-min SUN

Article in Press

Teacher Ngao girls’ secondary school

In this research a short proof of the abc conjecture is presented. It is shown that the product of the distinct prime factors of ABC is greater than the square-root of c. An identity connecting c and rad (ABC) is used to establish the lower limit value of rad (abc) in relationship to c.

Author(s):Samuel Bonaya Buya

Article in Press

Some Fixed point Theorems of Generalized Lipschitz Mappings on Cone Metric Spaces over Banach algebras of Integral type

This paper prove some xed point and common xed point theorems for pair of mappings satisfying contraction condition of integral type de ned on cone metric space over a Banach algebra

Author(s):Hudson Akewe, J.O Olilima

Article in Press

Order level Inventory Model of Non-instantaneous Deteriorating Items with Time Dependent Declining Demand and Permissible Delay in Payments

In this study, an Order Level Inventory Model for delayed (non-instantaneous) deteriorating items was constructed. The paper investigated an instantaneous replenishment inventory policy for a non-instantaneous deteriorating item considering time-dependent consumption rate under permissible delay in payments, meaning that, the retailer was allowed a grace period of time to settle for the goods or product supplied to him. In...

Author(s):Yahaya Ahmad and Abubakar Musa

Article in Press

Sensitivity Analysis Of Black-Scholes Formula Arising In Financial Mathematics

Options pricing without proper understanding of the sensitivities letters the essential measures of risk in option pricing theory and profit/loss guideposts in options pricing strategies is synonymous to flying a plane without the ability to study the instruments. Option pricing/valuation is complex activity in determining the pair price of derivative, as there are a lot of factors involved in the process which ...

Author(s):Hamza Abubakar

Article in Press

An Illustrative And Provable Speedy Rsa Decryption Process

In a bid to provide an effective way of providing confidentiality, researchers have invented a new promising form of encryption called homomorphic encryption to improve the security level and running time of RSA public-key cryptosystem. RSA algorithm is known for its security but execution speed is a demerit. This speed is due to the involvement of large bits of numbers in the three stages of its operations (key...

Author(s):Ibharalu FT, Onashoga SA, Olayiwola OM, Mesioye AE

Article in Press

Application of Second Order Ordinary Differential Equations to Simple harmonic and damped Motion

In this paper, Application of Second Order ordinary differential equations to Simple harmonic and damped Motion. , simple harmonic system which can easily be solved by period of motion, frequency of motion, equation of motion, amplitude and phase and phase constant. the damping force acts in a direction to the motion and solved by the general solutions of both homogenous(no external force) and non-homogenous (with external...

Author(s):Meseret Cherkos Tessema

Article in Press

Strong convergence theorem for finite family of generalised asymptotically nonexpansive maps

Let K be a nonexpansive retract of a uniformly convex Banach space X with retraction P and Ti:1 ;m : K 􀀀! X a finite family of uniformly countinous generalised asymptotically nonexpansive maps with a nonempty common fixed points set F. We provided and proved sufficient conditions for the strong convergence of a sequence of successive approximations generated by m-step algorithm to a point of F.

Author(s): Chika Moore, Agatha Chizoba Nnubia and Shiela Bishop

Article in Press

Modified Face Recognition Algorithm For Person Re-Identification With Application In Consumer Buyer Behaviour

Person re identification is one of the most challenging field of research, and yet it is very important in computer vision. Due to its challenges it still has many areas which are open for research. It is usually applied to the re identification of a person appearing on one camera as the same person identified previously by another camera on the same camera network. Person re identification is normally applied in security...

Author(s):Given T. Pfunguro

Article in Press

Thermodynamic analysis of a buoyancy–driven flow of a reactive internal heat generating third – grade fluid in a channel with convective boundary conditions

The study investigated the impacts of buoyancy force and heat source on a reactive third grade fluid flow within parallel channel. The results obtained for the coupled equations governing the fluid flow which are strongly nonlinear are secured using modified Adomian decomposition method (mADM). The present result is compared with the one in Makinde (2009) where the influence of buoyancy force and heat source were not...

Author(s):Anthony R.Hassan

Article in Press

Eigen energy values and Eigen functions of a particle in an infinite square well potential by Laplace Transform

Quantum mechanics is one of the branches of physics and is a fundamental theory which explains the nature of atoms and subatomic particles at the smallest scale of energy.In this mechanics, physical problems are solved by algebraic and analytic methods. By applying Laplace Transform we can find the general solutions of one dimensional Schrodinger’s time - independent wave equation for a particle in an infinite square well...

Author(s):Rohit Gupta, Rahul Gupta, Dinesh Verma

Article in Press

Yelli - a new extraction optimization approach to Frequent 2-itemsets

In this paper, we propose a new optimization approach to the APRIORI reference algorithm (AGR 94) for 2-itemsets (sets of cardinal 2). The approach used is based on two-item sets. We start by calculating the 1-itemets supports (cardinal 1 sets), then we prune the 1-itemsets that are not frequent and keep only those that are frequent (ie those that have the itemsets whose values are greater than or equal to a fixed minimum...

Author(s):Nombre Claude Issa, Brou Konan Marcelin, Kimou Kouadio Prosper

Article in Press

An Application on Weighted Composition Operators on Hardy Spaces

Let ϕ, (ϕ+ε) be closely analytic functions defined on D, such that ϕ(D)⊆D. The operator given by f⟼(ϕ+ε)(f∘ϕ) is called a weighted composition operator. We show the boundedness, compactness, weak compactness, and complete continuity of weighted composition operators on Hardy spaces H_(1+ε) (ε≥0). We show that such an operator is compact on H1 if and only if it is weakly compact on this space. This result depends on a...

Author(s):Mutari Haruna Dunari, Shawgy Hussein

Article in Press

Analysis of A Vaccination Mathematical Model of An Infectious Measles Disease

Mathematical modeling has provided a lot of solutions to the control of spread of epidemic diseases. In this paper, the analysis of a vaccination Mathematical model of an infectious Measles disease was carried out. The Model which is an SVEIR epidemic model was investigated in which the incidence rate was considered. The model was formulated and analytical study of the formulated model showed that the model has two...

Author(s):Ugochukwu Emmanuel Nwafor , Simeon Chioma Inyama, Andrew Omame and Hope Ifeyinwa Mbachu

Article in Press

On The Action Of Mobile Loads On An Uninterrupted Cylindrical Tunnel

The stationary transport load acts on the surface of the cavity or on the inner surface of the shell reinforcing cavity. The speed of the load movement is assumed to be subsonic, which corresponds to the modern transport speeds in the underground facilities under study. To describe the motion of a half-space and thick-walled shells, dynamic equations of the theory of elasticity in Lamé potentials are used, and for...

Author(s):Aslonov Bakhtiyor

Article in Press

Hydromagnetic natural convection flow with heat absorption in annulus under radial magnetic field

This paper examines the heat absorption fluid on natural convection flow in a vertical concentric annulus under a radial applied magnetic field. Exact solution momentum and energy equation are solved. The aim is to see the influence of each governing parameter on dimensionless velocity, temperature, volume flow rate, rate of heat transfer, skin friction and bulk temperature are discussed. During the course of the numerical...

Author(s):Abiodun O. Ajibade and Jeremiah J. Gambo

Article in Press

On a character associated to a representation of Cartan subgroup of an acceptable Lie group

Let G be a connected semi-simple Lie group, g its Lie algebra, j a Cartan subalgebra of g, jc be a complexification of j and Jc the analytic Cartan subgroup associated with jc. Let Φ denote the set of roots of the pair (gc,jc). If α is an element of Φ, then there exists a holomorphic homomorphism ξα of Jc into C* such that : ξα(expH) = eα(H) ∀ H ∈ jc. Let π be a representation of jc in a finite dimensional vector space...

Author(s):Gaël Ngambali Ndzakima, Kinvi Kangni

Article in Press

Degree of Vertices and Number of edges in a Mixed Graph

In the study of a graph theory, degrees of vertices, number of edges are among the important theoretical terms which are helpful in the study of discrete structures and their properties. This manuscript attempts to present the relationship between number of edges and degrees of vertices in a mixed graph

Author(s):Abdelkadir Muzey Mohammed

Article in Press


In this paper, a rigorous proof of the strong Goldbach Conjecture is provided. This proof is mainly based on application of Chebotarev -Artin theorem ,Mertens formula ‘s . By using the principle of inclusion -exclusion of Moivre in the set which elements are in arithmetic progression We show that it is always possible to find at least one pair of prime numbers according to the validity of the condition [1]. Moreover,...

Author(s):Idriss Olivier Bado

Article in Press

An elegant and short proof of Goldbach conjecture

In this paper several methods are examined for proving the Goldbach conjecture. At the preliminary analysis stage a Diophantine equation solution method is proposed for Goldbach partition of a Goldbach number. The proof method proposed however is found to be incomplete since it does not have mechanisms for dealing with the prime gap problem. On the further analysis section some graphical and linear analytical methods are...

Author(s):Samuel Bonaya Buya

Article in Press

Implementing Chiu’s fixed lifetime inventory model

The fixed lifetime inventory system with zero or positive leadtime has being considered by various authors, with the aim of reducing the quantity outdating in the inventory system. Chiu (1995), considered the positive leadtime case by approximating the expected shortage quantity, the expected outdate quantity and the expected on hand inventory. His result was a ordering policy where are the ordered quantity and the reorder...

Author(s):Izevbizua O. and Omosigho S. E

Article in Press


In this paper the concept of a generalized fuzzy soft point is introduced and some of its basic properties are studied. Also, the concepts of a generalized fuzzy soft base (subbase) and a generalized fuzzy soft subspace are introduced and some important theorems are established

Author(s):F. H. KHEDR FATHI HESHAM KHEDR, S.A. ABD EL-BAKI Shaker Ahmad Abd El-Baky

Article in Press

Some combinatorial problems in the symmetric inverse semigroups

The subsemigroup of order-preserving and order-decreasing and order-reversing partial one-one transformation were studied. The element of partial one-one transformation was constructed and the combinatorial results of their cardinality, fix point, height, waist and idempotent were enumerated. Finally, the results were presented and highlighted open problems.


Article in Press


Given a differential equation with the condition ), where is any point in the domain of y, we can define an initial value problem as a problem whose solution is being sought for at a particular point. Therefore an initial value problem is of the form; , ), for where is the domain of .In this work we shall concern ourselves with the analysis of first order ordinary equations of initial value type which are of the form =...

Author(s):Okereke .C. Emmanuel, Nnochiri . U. Ifeoma, Abangwu .E. Chika

Article in Press

Analytical Solution of the Ebola Epidemic model by Homotopy Perturbation method

In this paper, we present a mathematical model of Ebola disease comprising differential equations. We employ the Homotopy perturbation method to the proposed model to determine both the analytic and approximate solutions. Following our results we then observed that Homotopy perturbation method is one the most crucial and effective as just few perturbation terms are enough to obtain a reasonable accurate solution. The...

Author(s):Bonyah Ebenezer, O.T. Kolebaje, Asiedu-Addo Samuel Kwesi

Article in Press


Government revenue and expenditure relationship had been a source of concern in statistics, given its relevance in National Economic Planning and Policy making in Nigeria especially with respect to growth and stability of the economy. The purpose of this research work is to investigate and compare the estimates of 2SLS and 3SLS in predicting revenue and expenditure of Nigeria using revenue and expenditure data sourced from...


Article in Press

Heteroscedasticity in One Way Multivariate Analysis Of Variance

This work aimed at developing an alternative procedure to MANOVA test when there is problem of heteroscedasticity of dispersion matrices and compared the procedure with an existing multivariate test for vector of means (by Johanson). The alternative procedure was developed by adopting Satterthwaite’s approach of univariate test for unequal variances. The approach made use of approximate degree of freedom method in one way...

Author(s):ONI ADEBAYO, Gafar Oyeyemi, Babatunde Adeleke

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