Fallahi, Asadollah; Raftery, James G.(Springer, 2024-10)
We exhibit infinitely many semisimple varieties of semilinear De Morgan
monoids (and likewise relevant algebras) that are not tabular, but which have only tabular
proper subvarieties. Thus, the extension of relevance ...
In this work, we study the dual effects of linear cross-diffusion and geometry on reaction–diffusion systems
for pattern formation on rectangular domains. The spatiotemporal dynamics of the reaction–diffusion system
with ...
Van Niekerk, Andries; Moutzouris, Vasili; Mare, Eben(AOSIS, 2024-09-17)
BACKGROUND : Many retirees in South Africa face the challenge of either outliving their
retirement savings or living below their means. Studies suggest a ‘safe’ withdrawal rate of
between 4% and 5%, which is below the ...
Hariparsad, Sanveer; Mare, Eben(AOSIS, 2024-05-31)
BACKGROUND : This study focuses on diversifying fixed income attribution beyond yield and
duration by identifying new risk premia applicable to various investment strategies.
AIM : To identify cross-sectional bond risk ...
Smallholder farmers rely on their farm earnings to cover operating costs and generate income. That is not an easy task because of the pests, which reduce yields and generate plant protection costs. The farm yield and plant ...
Crnkovic, Vedrana Mikulic; Traunkar, Ivona; Rodrigues, Bernardo G.(American Institute of Mathematical Sciences, 2024)
By a suitable extension of incidence matrices, orbit matrices, and
submatrices of orbit matrices of weakly p-self-orthogonal 1-designs, in this paper
we describe a construction of LCD codes over a finite field. To ...
Although much progress has been made in reducing the public health burden of the human immunodeficiency virus (HIV), which causes acquired immunodeficiency syndrome (AIDS), since its emergence in the 1980s (largely due to ...
Milonas, Natasa; Van Vuuren, Gary(EconJournals, 2024-03)
Because credit losses can be substantial, managing credit risk is a focus area of risk measurement and management. It is important for financial institutions to select credit risk models that accurately forecast losses. ...
Moraschini, Tommaso; Wannenburg, Johann Joubert; Yamamoto, Kentaro(Cambridge University Press, 2024)
We introduce prime products as a generalization of ultraproducts for positive logic. Prime products are shown to satisfy a version of Łoś’s Theorem restricted to positive formulas, as well as the following variant of the ...
After collecting a number of results on interval and almost interval preserving linear
maps and vector lattice homomorphisms, we show that direct systems in various
categories of normed vector lattices and Banach lattices ...
We show that, for a class of locally solid topologies on vector lattices, a topologically convergent net has an embedded sequence that is unbounded order convergent to the same limit. Our result implies, and often improves, ...
Van Yperen, James; Campillo-Funollet, Eduard; Inkpen, Rebecca; Memon, Anjum; Madzvamuse, Anotida(Public Library of Science, 2023-05-03)
The mathematical interpretation of interventions for the mitigation of epidemics in the literature
often involves finding the optimal time to initiate an intervention and/or the use of the
number of infections to manage ...
In this paper, we develop and analyze a mathematical model for spreading malaria, including treatment with transmission-blocking drugs (TBDs). The paper's main aim is to demonstrate the impact the chosen model for demographic ...
We construct and analyse nonstandard finite difference (NSFD) schemes for two epidemic optimal control problems. Firstly, we consider the well-known MSEIR system that can be used to model childhood diseases such as the ...
In this paper, we show that an extension of the classical Tikhonov–Fenichel asymptotic procedure applied to multiscale models of vector-borne diseases, with time scales determined by the dynamics of human and vector ...
The sterile insect technique (SIT) is a biological control technique that can be used either to eliminate or decay a wild mosquito population under a given threshold to reduce the nuisance or the epidemiological risk. In ...