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  • The Gutman Index and the Edge-Wiener Index of Graphs with given Vertex-Connectivity 

    Mazorodze, Jaya Percival; Mukwembi, Simon; Tomáš, Vetrík (University of Zielona Góra, 2015-12-30)
    The Gutman index and the edge-Wiener index have been extensively investigated particularly in the last decade. An important stream of re- search on graph indices is to bound indices in terms of the order and other parameters ...
  • Application of citrus sinensis solid waste as a pseudo- catalyst for free cyanide conversion under alkaline conditions 

    Santos, Bruno Alexandre Quistorp; Ntwampe, Seteno Karabo Obed; Doughari, James Hamuel; Muchatibaya, Gift (BioResources, 2013-05-08)
    In this study, Citrus sinensis (C. sinensis) solid waste was used to catalyze the conversion of free cyanide (F-CN) under alkaline conditions; conditions which represent most industrial wastewater containing F-CN. Acid ...
  • Unsteady contact melting of a rectangular cross section material on a flat plate. 

    Myer, T G; Mitchell, S L; Muchatibaya, Gift (American Institute of Physics, 2008-10-06)
    The work in this paper concerns a mathematical model of the contact melting process of a rectangular material in contact with a hot plate. The problem is described by a coupled system of heat equations in the solid and ...
  • A Note on the Discrete Spectrum of Gaussian Wells (I): The Ground State Energy in One Dimension 

    Muchatibaya, Gift; Fassari, S.; Rinaldi, F.; Mushanyu, Josiah (Hindawi Publishing Corporation, 2016-02-07)
    The ground state energy 𝐸 0(𝜆) of 𝐻 𝜆 = − 𝑑 2 /𝑑𝑥 2 − 𝜆 𝑒 −𝑥2 is computed for small values of 𝜆 by means of an approximation of an integral operator in momentum space. Such an approximation leads to a transcendental ...
  • Average distance and edge-connectivity I 

    Dankelmann, Peter; Mukwembi, Simon; Swart, Henda C (Society for Industrial and Applied Mathematics, 2015-01-15)
    The average distance $\mu(G)$ of a connected graph G of order n is the average of the distances between all pairs of vertices of G. We prove that if G is a $\lambda$-edge-connected graph of order n, then the bounds $\mu(G) ...
  • Minimum degree, leaf number and traceability 

    Mukwembi, Simon (Institute of Mathematics of the Czech Academy of Sciences, 2013-03-26)
    Let G be a finite connected graph with minimum degree δ. The leaf number L (G) of G is defined as the maximum number of leaf vertices contained in a spanning tree of G. We prove that if δ >12(L (G) + 1), then G is 2-connected. ...