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193 articles
41
Research Article DOI: 10.67897/njma.2026.phtju71m

A Halpern Resolvent-Subgradient-Extragradients Method for finding common solution of fixed point, h-fixed point, equilibrium and variational inequality problems in Banach spaces

Enyinnaya Ekuma-Okereke*, Joseph O. Ogbodu

The key idea behind solving well known applicable problems is to reformulate the problems as finding a fixed point of a suitably defined mapping. The theory of variational inequalities and equilibrium problems involving some operators with monotonicity conditions have received remarkable development with several methods suggested for solving them. Efforts have significantly been made in approximat...

Jun, 2026 pp. 31-46 28 views 19 downloads
42
Research Article DOI: 10.67897/njma.2022.9b6frnnz

An Optimization of Inventory in Retrospect of the Directorate of Physical Planning in Ambrose Alli University Ekpoma, Edo State

E. Egbon*, F. M. Okoro, J. O. Braimah

This study proposes a mathematical model for the Directorate of Physical Planning’s inventory materials at Ambrose Alli University in Ekpoma, Edo State. To minimize the total cost for the year 2015, the study uses the linear programming solver (MATLAB’s linprog solver). To give the most efficient inventory among the products purchased, as well as the ideal minimum cost for the inventory, program c...

Jun, 2022 pp. 31-46 13 views 6 downloads
43
Research Article DOI: 10.67897/njma.2021.j9awmknz

Mathematical Modelling of an Insurer’s Portfolio and Reinsurance Strategy under the CEV Model and CRRA Utility

Udeme O. Ini*, Ndipmong A. Udoh, K. N. C. Njoku, Edikan E. Akpanibah

One of the major problems encountered by most insurance com panies is portfolio management and payment of claims. Hence the study of optimal portfolio strategy (OPS) and optimal reinsurance strategy (ORS) becomes necessary. In this paper, the insurer is allowed to invest in a risk-free-asset and a risky-asset, where the risky-asset price follows the constant elasticity variance model and can buy p...

Jul, 2021 pp. 34−52 12 views 3 downloads
44
Research Article DOI: 10.67897/njma.2019.m42hcrae

A family of harmonic univalent functions denied by a linear multiplier fractional operator

Y. O. Afolabi*, Olubunmi A. Fadipe-Joseph, Catherine N. Ejieji, Olanike R. Oluwaseyi

In this paper, we use a generalized linear multiplier fractionaldifferential operator to define a new family of harmonic univalentfunctions in the unit disk. Also, we obtain the coecient conditions,convolution condition and convex combination for the class.

Dec, 2019 pp. 36-47 5 views 4 downloads
45
Research Article DOI: 10.67897/njma.2019.82jt6nzz

Common Fixed Point Theorems for Five Self Mappings in a Complete Metric Space

I. A. Sani*, Kamilu RAUF

In this research work, we use five different operators P, Q, R, T, and B, to show that there exists a common fixed point among the five operators and prove the uniqueness. Furthermore, we establish that the pairs (R,B),(R,Q),(R,T) and (R,P) are weakly compatible (that is they commute). The result extend and improve the work of Latpate and Dolhare (2017).

Apr, 2019 pp. 38−50 12 views 4 downloads
46
Research Article DOI: 10.67897/njma.2019.ne81tajw

Common Fixed Point Theorems for Five Self Mappings in a Complete Metric Space

I. A. Sani*, Kamilu RAUF

In this research work, we use five different operators P, Q, R, T, and B, to show that there exists a common fixed point among the five operators and prove the uniqueness. Furthermore, we establish that the pairs (R,B),(R,Q),(R,T) and (R,P) are weakly compatible (that is they commute). The result extend and improve the work of Latpate and Dolhare (2017).

Apr, 2019 pp. 38−50 15 views 5 downloads
47
Research Article DOI: 10.67897/njma.2026.31hpw8pl

MOBILE DIGITAL CASH PAYMENT FOR MOBILE PHONE USERS

Usman F*, Olabiyisi S. O, Emuoyibofarhe O. J

As mobile communications become increasingly sophisticated and ubiquitous, the use of portable devices aims to exploit the increasing processing power of these consumer devices. This paper proposes a new computing model that tries to provide user mobility service to all applications through a system-level solution. It present the design and implementation of a model for mobile computing called Web...

Dec, 2015 pp. 39−46 12 views 3 downloads
48
Research Article DOI: 10.67897/njma.2014.85am2tpf

Crank-Nicolson Galerkin Error Estimates for Linear Stochastic Wave Equation driven by Space-Time White Noise

Ignatius N. NJOSEH*

We considered the linear stochastic wave equation driven by space-time white noise. The Galerkin finite element method was used to derive the approximate solution. For the time discretization, we applied the Crank-Nicolson finite di erence approximation scheme and the error estimates were proved both in the L2 and maximum norms.

Jun, 2014 pp. 39-48 4 views 4 downloads
49
Research Article DOI: 10.67897/njma.2024.huzbmlro

Flux-Hardy Inequalities with Optimal Constants via Divergence and Rearrangements

M. A. Anise*, S. L. Soleye, K. Rauf

We develop sharp Hardy-type inequalities for boundary flux functionals generated by dilations of a fixed smooth set in R n. The method combines the divergence theorem with rearrangement bounds to reduce flux estimates to one-dimensional Hardy averages. Directional, divergence-form, and multi-flux inequalities are obtained in arbitrary dimension with the optimal constant p p−1 p , and sharpness is...

Jun, 2024 pp. 40-47 2 views 2 downloads
50
Research Article DOI: 10.67897/njma.2022.tkhiwpg5

Second Derivatives Single Step Block Hybrid Method for Non-Linear Dynamical System

Umaru Mohammed*, Jamiu Garba, Abdullahi Aliyu Alhaji, A. I. Ma’ali, Mikhail Semenov

In this paper, a modified single-step method is proposed to integrate nonlinear dynamical systems resulting to ordinary differential equations. In order to obtain higher order A-stable method, we have used second derivative of the solutions and imposed some special sets of off-grid points in the formulation process of the algorithms. The consistency, convergence and order of accuracy of the algori...

Dec, 2022 pp. 42-55 6 views 5 downloads