Volume 3, Issue 1

 

ارسال های اخیر

  • Automatic graph construction of periodic open tubulene ((5,6,7)3) and computation of its Wiener, PI, and Szeged indices 

    YOOSOFAN, A.؛ NAMAZI−FARD, M. (University of Kashan, 2012-02-01)
    The mathematical properties of nano molecules are an interesting branch of nanoscience for researches nowadays. The periodic open single wall tubulene is one of the nano molecules which is built up from two caps and a ...

  • Some topological indices of graphs and some inequalities 

    MOGHARRAB, M.؛ KHEZRI–MOGHADDAM, B. (University of Kashan, 2012-02-01)
    Let G be a graph. In this paper, we study the eccentric connectivity index, the new version of the second Zagreb index and the forth geometric–arithmetic index.. The basic properties of these novel graph descriptors and ...

  • Computing the Szeged index of 4,4 ׳-bipyridinium dendrimer 

    ARJOMANFAR, A.؛ GHOLAMI, N. (University of Kashan, 2012-02-01)
    Let e be an edge of a G connecting the vertices u and v. Define two sets N1 (e | G) and N2(e |G) as N1(e | G)= {xV(G) d(x,u) d(x,v)} and N2(e | G)= {xV(G) d(x,v) d(x,u) }.The number of elements of N1(e | G) and N2(e ...

  • Distance-based topological indices of tensor product of graphs 

    Nadjafi-Arani, Javad؛ Khodashenas, H. (University of Kashan, 2012-02-01)
    Let G and H be connected graphs. The tensor product G + H is a graph with vertex set V(G+H) = V (G) X V(H) and edge set E(G + H) ={(a , b)(x , y)| ax ∈ E(G) & by ∈ E(H)}. The graph H is called the strongly triangular if ...

  • Centric connectivity index by shell matrices 

    Diudea, M (University of Kashan, 2012-02-01)
    Relative centricity RC values of vertices/atoms are calculated within the Distance Detour and Cluj-Distance criteria on their corresponding Shell transforms. The vertex RC distribution in a molecular graph gives atom ...

  • Study of fullerenes by their algebraic properties 

    GHORBANI, mojtab؛ Heidari Rad, S. (University of Kashan, 2012-02-01)
    The eigenvalues of a graph is the root of its characteristic polynomial. A fullerene F is a 3- connected graphs with entirely 12 pentagonal faces and n/2 -10 hexagonal faces, where n is the number of vertices of F. In this ...

  • Chebyshev finite difference method for a two−point boundary value problems with applications to chemical reactor theory 

    Saadatmandi, A.؛ Azizi, M. (University of Kashan, 2012-02-01)
    In this paper, a Chebyshev finite difference method has been proposed in order to solve nonlinear two-point boundary value problems for second order nonlinear differential equations. A problem arising from chemical reactor ...

  • On the edge reverse Wiener indices of TUC4C8(S) nanotubes 

    Mahmiani, A.؛ Khormali, O.؛ Iranmanesh, A. (University of Kashan, 2012-02-01)
    The edge versions of reverse Wiener indices were introduced by Mahmiani et al. very recently. In this paper, we find their relation with ordinary (vertex) Wiener index in some graphs. Also, we compute them for trees and ...

  • On discriminativity of Zagreb indices 

    Doslic, T. (University of Kashan, 2012-02-01)
    Zagreb indices belong to better known and better researched topological indices. We investigate here their ability to discriminate among benzenoid graphs and arrive at some quite unexpected conclusions. Along the way we ...