Browsing Research Articles (Mathematics and Applied Mathematics) by Title

Browsing Research Articles (Mathematics and Applied Mathematics) by Title

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  • Waves without the wave equation : examples from nonlinear acoustics 
    Dziwa, S.K. (Simba); Sauer, Niko (Elsevier, 2018-12)
    The traditional wave equation is mostly, if not always, obtained from a system of first order partial differential equations augmented by constitutive relations. These are often nonlinear and linearizations are forcibly ...
  • Weak solutions of a stochastic model for two-dimensional second grade fluids 
    Razafimandimby, Paul Andre; Sango, Mamadou (Hindawi Publishing Corporation, 2010)
    We initiate the investigation of a stochastic system of evolution partial differential equations modelling the turbulent flows of a second grade fluid filling a bounded domain of R2. We establish the global existence of ...
  • Weakly totally permutable products and fitting classes 
    Madanha, Sesuai Yasha (University of Isfahan, 2021-03)
    Please read abstract in the article.
  • Weather-driven malaria transmission model with gonotrophic and sporogonic cycles 
    Okuneye, Kamaldeen; Eikenberry, Steffen E.; Gumel, Abba B. (Taylor and Francis, 2019)
    Malaria is mainly a tropical disease and its transmission cycle is heavily influenced by environment: The life-cycles of the Anopheles mosquito vector and Plasmodium parasite are both strongly affected by ambient ...
  • What if quantum theory violates all mathematics? 
    Rosinger, Elemer E. (De Gruyter Open, 2017)
    It is shown by using a rather elementary argument in Mathematical Logic that if indeed, quantum theory does violate the famous Bell Inequalities, then quantum theory must inevitably also violate all valid mathematical ...
  • Why has the equal weight portfolio underperformed and what can we do about it? 
    Taljaard, Byran Hugo; Mare, Eben (Routledge, 2021)
    It is widely noted that market capitalisation weighted portfolios are inefficient and underperform an equal weighted portfolio over the long-term. However, at least since 2016, an equal weighted portfolio of stocks in the ...
  • Wiener index of trees of given order and diameter at most 6 
    Mukwembi, Simon; Vetrik, Tomas (Cambridge University Press, 2014-06)
    The long-standing open problem of nding an upper bound for the Wiener index of a graph in terms of its order and diameter is addressed. Sharp upper bounds are presented for the Wiener index, and the related degree ...
  • Will an imperfect vaccine curtail the COVID-19 pandemic in the U.S.? 
    Iboi, Enahoro A.; Ngonghala, Calistus N.; Gumel, Abba B. (KeAi Publishing Communications Ltd., 2020-08-06)
    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 ...
  • Will vaccine-derived protective immunity curtail COVID-19 variants in the US? 
    Mancuso, Marina; Eikenberry, Steffen E.; Gumel, Abba B. (KeAi Communications, 2021-09-09)
    Multiple effective vaccines are currently being deployed to combat the COVID-19 pandemic, and are viewed as the major factor in marked reductions of disease burden in regions with moderate to high vaccination coverage. ...
  • Wiskundige modellering : vanaf skool na universiteit 
    Harding, Ansie (Suid Afrikaanse Akademie vir Wetenskap & Kuns, 2009-12)
    The outcomes based education (OBE) system is characterised by controversy and the 2008 matric results that rendered admission to an unusually large number of students did nothing to silence critics. The first students ...
  • Witt's theorem in abstract geometric algebra 
    Ntumba, Patrice P. (Springer, 2010)
    In an earlier paper of the author, a version of the Witt’s theorem was obtained within a specific subcategory of the category of A-modules: the full subcat-egory of convenient A-modules. A further investigation yields ...
  • Zabrejko's lemma and the fundamental principles of functional analysis in the asymmetric case 
    Mabula, Mokhwetha Daniel; Cobzas, Stefan (Elsevier, 2015-04)
    Some versions of the fundamental principles of the functional analysis in asymmetric normed spaces – the Open Mapping Theorem, the Closed Graph Theorem and the Uniform Boundedness Principle – are proved. The proofs are ...
  • Zeros of linear combinations of Laguerre polynomials from different sequences 
    Driver, Kathy (Cathryn Helena Stanford); Jordaan, Kerstin Heidrun (Elsevier, 2009)
    We study interlacing properties of the zeros of two types of linear combinations of Laguerre polynomials with different parameters, namely Rn = Lαn + aL α’n and Sn = Lαn + bLα’n-1. Proofs and numerical counterexamples are ...
  • Zeros of polynomials embedded in an orthogonal sequence 
    Beardon, Alan; Driver, Kathy (Cathryn Helena Stanford); Jordaan, Kerstin Heidrun (Springer, 2011-07)
    Please read abstract in article.
  • Zeros of primitive characters of finite groups 
    Madanha, Sesuai Yasha (De Gruyter, 2020-03)
    We classify finite non-solvable groups with a faithful primitive complex irreducible character that vanishes on a unique conjugacy class. Our results answer a question of Dixon and Rahnamai Barghi and suggest an extension ...
  • Zeros of quasi-orthogonal Jacobi polynomials 
    Driver, Kathy; Jordaan, Kerstin Heidrun (National Academy of Science of Ukraine, 2016)
    Please read abstract in the article.