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Article
Ktrend - International Journal of Mathematics and Statistics (IJMS) · 2026
Forecasting the Naira–Pound Sterling Exchange Rate: A Comparative Analysis of ARIMA, ARIMAX and ARIMA-GARCH Models
Accurate exchange-rate forecasting is important for financial planning, international trade, investment decisions and macroeconomic management. This study develops and compares three time-series forecasting approaches for the Naira–Pound Sterling exchan…
Article
Ktrend – Nigerian Journal of Mathematical and Computational Sciences · 2026
Mathematical Analysis of a Stochastic SEIARV Model for COVID-19 Disease Transmission with Intervention
This study presents a stochastic SEIARV model for analysing COVID-19 transmission and vaccination intervention. The model incorporates symptomatic and asymptomatic infectious individuals, demographic recruitment and mortality, disease-induced mortality, incom…
Article
African Journal of Mathematics, Statistics and Computer Science · 2026
Stability Thresholds and Bounded Hybrid Neural Modifiers in a Fractional HIV–CD4+ T-Cell Model
A commensurate Caputo model of HIV infection of CD4+ T cells is analysed by separating biologically admissible equilibria from algebraic roots. Building on the fractional model of Okeke et al. [1] and the hybrid activation construction of Essang et al. [2], t…
Article
Ktrend – Nigerian Journal of Mathematical and Computational Sciences · 2026
Structural Identifiability and Gradient Bounds for Hybrid-Activation Learning of Fractional HIV Dynamics
The recovery of biological parameters from fractional HIV trajectories is examined alongside the mathematical properties of hybrid neural activations. Using the model of Okeke et al. [1] and the five-component activation mixture of Essang et al. [2], an exact…
Article
African Journal of Mathematics, Statistics and Computer Science · 2026
A Machine-Learning Approach To Predictive Quality Assurance And Accreditation Monitoring In Nigerian Universities
Programme accreditation by the National Universities Commission (NUC) is the main external quality assurance mechanism in Nigerian universities, but it is periodic and retrospective: weaknesses are usually discovered during the visit rather than before it. Th…
Article
KnowledgeTrend Journal · 2026
Certified Conjugacy Learning in Small-Cancellation Groups
The conjugacy decision problem is fundamental in combinatorial group theory and has applications in algebraic cryptography. Previous machine-learning studies demonstrated that conjugacy can be classified in selected non-free groups, but a statistical predicti…
Article
Ktrend - International Journal of Mathematics and Statistics (IJMS) · 2026
A Comparative Imputations Statistics Approaches With Application to Nigerian Rainfall Data
Missing values in rainfall datasets reduce the reliability of statistical inference and undermine decision-making in agriculture, climate studies, and environmental management. This study evaluated the performance of five imputation techniques; Expectation-Ma…
Article
Ktrend – Nigerian Journal of Mathematical and Computational Sciences · 2026
Extended Green Relations and Rank Pair Enumeration in Finite Rhotrix Semigroups
Let $q$ be a prime power and let $T_m(q)$ be the monoid of order-$(2m-1)$ Rhotrix arrays whose row–column multiplication corresponds to componentwise multiplication in $M_m(\mathbb F_q)\times M_{m-1}(\mathbb F_q)$. The extended Green relations $\mathcal L^*$ …
Article
KnowledgeTrend Journal · 2026
Cumulative-Exposure Thresholds in Post-Quantum Migration Risk: An Occupation-Time Model with Exact Passage Laws
A Markov model that allows a vulnerable cryptographic deployment to return to a safe state can inadvertently erase risk accumulated before remediation. We formulate a cumulative-exposure threshold model for post-quantum migration analysis. A two-state continu…
Article
Ktrend - International Journal of Computer Science and Artificial Intelligence (IJCSAI) · 2026
Development of an AI-Powered Ransomware Early Warning System for Hospital Managements
Ransomware poses an escalating threat to healthcare institutions, where attacks disrupt clinical workflows, compromise patient data, and directly endanger patient safety. Existing detection systems are reactive, binary in classification, and lack contextual a…
Article
Ktrend – Nigerian Journal of Mathematical and Computational Sciences · 2026
Stress Testing Nigerian Banks: An Exponential-Decay Geometric Brownian Motion Model
This paper applies an exponential-decay geometric Brownian motion (GBM) model to illustrate how shocks and sustained downward pressure may affect Nigerian bank stock prices. The standard GBM drift is adjusted from $\mu$ to $\mu-k$, where $k>0$ is the decay ra…
Article
African Journal of Mathematics, Statistics and Computer Science · 2026
Solution of a Linear Stochastic Differential Equation for the Impact of Inflation and Long-Term Growth Trends on Bank Valuation
This study investigates the dynamics of Nigerian bank stock prices using an exponential-growth geometric Brownian motion framework. The model extends the classical geometric Brownian motion (GBM) by incorporating a growth-adjustment parameter $k$ in the drift…
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