Venter, Pierre J.; Mare, Eben; Pindza, Edson(Cogent OA, 2020)
In this paper, two univariate generalised autoregressive conditional heteroskedasticity (GARCH) option pricing models are applied to Bitcoin and the
Cryptocurrency Index (CRIX). The first model is symmetric and the other ...
The novel coronavirus (COVID-19) that emerged from Wuhan city of China in late
December 2019 continue to pose devastating public health and economic challenges across
the world. Although the community-wide implementation ...
Okeke, Godwin Amechi; Abbas, Mujahid; De la Sen, Manuel(MDPI, 2020-06)
We propose two new iterative algorithms for solving K-pseudomonotone variational inequality
problems in the framework of real Hilbert spaces. These newly proposed methods are obtained by
combining the viscosity approximation ...
In this paper we introduce the concepts of ψ-contraction and monotone ψ-contraction
correspondence in “fuzzy b-metric spaces” and obtain fixed point results for these contractive
mappings. The obtained results generalize ...
Oke, Sengun I.; Ojo, Michael M.; Adeniyi, Michael O.; Matadi, Maba M.(SCIK Publishing Corporation, 2020-07)
This article suggested and analyzed the transmission dynamics of malaria disease in a population using
a nonlinear mathematical model. The deterministic compartmental model was examined using stability theory
of differential ...
Owolabi, Kolade M.; Pindza, Edson(American Institute of Mathematical Sciences, 2020-03)
Ginzburg-Landau equation has a rich record of success in describing a vast variety of nonlinear phenomena such as liquid crystals, superfluidity, Bose-Einstein condensation and superconductivity to mention a few. Fractional ...
Taljaard, Byran Hugo; Mare, Eben(Actuarial Society of South Africa, 2019)
We analyse and discuss the use of an equal-weighted index as an alternative to the market capitalisation
weighted (cap-weighted) index as a benchmark for active equity portfolios in the South African equity
market. Our ...
Flint, Emlyn James; Mare, Eben(Actuarial Society of South Africa, 2019)
It is now an accepted fact that the majority of financial markets worldwide are neither normal nor
constant, and South Africa is no exception. One idea that can be used to understand such markets and
has been gaining ...
A graph property is a class of graphs which is closed under isomorphisms. Some properties are also closed under one or more
specified constructions that extend any graph into a supergraph containing the original graph as ...
Mabitsela, Lesedi; Guambe, Calisto; Kufakunesu, Rodwell(Taylor and Francis, 2020)
We derive a representation for dynamic capital allocation when the underlying asset price process includes extreme random price movements. Moreover, we consider the representation of dynamic risk measures defined under ...
Djoukwe Tapi, M.; Bagny-Beilhe, Leila; Dumont, Yves(Elsevier, 2020-08)
Cocoa mirid, Sahlbergella singularis, is known to be one of the major pests of cocoa in West Africa. In this paper, we consider a biological control method, based on mating disrupting, using artificial sex pheromones, and ...
Recent dramatic declines in global malaria burden and mortality can be largely attributed to the large-scale deployment of insecticidal-based measures, namely long-lasting insecticidal nets (LLINs) and indoor residual ...
Viljoen, Johan W.; De Villiers, J Pieter.; Van Zyl, Augustinus J.; Mezzavilla, Massimo.; Pepper, Michael S.(Nature Research, 2019-07)
Analytical and statistical stochastic approaches are used to model the dispersion of monogenic variants through large populations. These approaches are used to quantify the magnitude of the selective advantage of a monogenic ...
Botha, J.J. (Hanlie); Van Putten, Sonja; Kundema, Imani(University of Free State, 2019-11)
Visual literacy is defined as competencies that enable an individual
to understand, interpret, use, generate, and evaluate visual images
or messages. The role of visual literacy in teaching mathematics
is to enhance ...
Although the widespread use of indoors residual spraying (IRS) and insecticides treated bednets (ITNs; later replaced by long-lasting insecticidal nets (LLINs)) has led to a dramatic reduction of malaria burden in endemic ...
In this paper a full description of order isomorphisms between effect algebras of atomic JBW-algebras is given. We will derive a closed formula for the order isomorphisms on the effect algebra of type I factors by proving ...
Saleem, Naeem; Abbas, Mujahid; De la Sen., Manuel(MDPI Open Access Journals, 2019)
The purpose of this paper is to introduce af -proximal H-contraction of the first and second
kind in the setup of complete fuzzy metric space and to obtain optimal coincidence point results.
The obtained results unify, ...