Volume 4, 1-2

 

ارسال های اخیر

  • Spectral properties of some matrices related to topological indices 

    Zangi, Samaneh (Shahid Rajaee Teacher Training University, 2014-06-01)
    A topological index is a kind of molecular descriptor which anticipates some properties of chemical compound. The aim of this paper is to compute the spectrum of PA adjacency matrix associated to a well-known topological index.

  • On the Zagreb indices of overfull molecular graphs 

    Jalali-Rad, Maryam (Shahid Rajaee Teacher Training University, 2014-06-01)
    Let G be a connected graph on n vertices. An overfull graph is a graph whose number of its edges is greater than Δ × [n/2], where Δ is the maximum degree of vertices in G. In this paper, we compute the Zagreb indices of ...

  • Computing the energy of small fullerenes 

    Ghorbani, Tayebeh (Shahid Rajaee Teacher Training University, 2014-06-01)
    The concept of energy of graph is defined in 1978 by Ivan Gutman as the sum of the absolute values of the eigenvalues of a graph. In this article we estimate the energy of small fullerenes.

  • On the spectrum of Cayley graphs via character table 

    Nowroozi, Farzaneh؛ Ghorbani, Modjtaba (Shahid Rajaee Teacher Training University, 2014-06-01)
    A Cayley graph can be consider as an interpretation of group representation. This means that one can construct the Cayley graph Г = Cay(G, S) by having the vertex set to be the elements of G with g~h if and only if ...

  • Augmented eccentric connectivity index of Fullerenes 

    Sharafdini, Reza (Shahid Rajaee Teacher Training University, 2014-06-01)
    Fullerenes are carbon-cage molecules in which a number of carbon atoms are bonded in a nearly spherical configuration. The augmented eccentric connectivity index of graph G is defined as £(G)=∑u εV(G)M(u)ε(u)

  • Differences between Wiener and modified Wiener indices 

    Hakimi-Nezhaad, Mardjan؛ Ghorbani, Modjtaba (Shahid Rajaee Teacher Training University, 2014-06-01)
    The Wiener index is the oldest topological index introduced by H. Wiener for anticipating the boiling point of Paraffin and some other alkenes. An algebraic approach for generalizing the Wiener index is proposed by Graovac ...