Volume 1, 1-2

 

ارسال های اخیر

  • Computing fifth geometric-arithmetic index for nanostar dendrimers 

    Graovac, Ante؛ Ghorbani, Modjtaba؛ Hosseinzadeh, Mohammad Ali (Shahid Rajaee Teacher Training University, 2011-06-01)
    The geometric-arithmetic index is a topological index was defined as GA(G)=∑uv2(dudv)1/2/(du+dv), in which degree of vertex u denoted by dG(u ). ...

  • The PI and vertex PI polynomial of dendimers 

    Salahshour, Mohammad Ali (Shahid Rajaee Teacher Training University, 2011-06-01)
    Let G be a simple connected graph. The vertex PI polynomial of G is defined as PIv(G ,x )=Σe=uv Xnu(e)+nv(e) here nu

  • Augmented eccentric connectivity index of single defect nanocones 

    Doslic, Tomislav؛ Salehi, Mahboobeh (Shahid Rajaee Teacher Training University, 2011-06-01)
    We present explicit formulas for the values of augmented eccentric connectivity indices of single-defect nanocones. Our main result is that the augmented eccentricity index of an n-layer nanocone with a single k-gonal ...

  • Connective eccentric index of fullerenes 

    Ghorbani, Modjtaba (Shahid Rajaee Teacher Training University, 2011-06-01)
    Fullerenes are carbon-cage molecules in which a number of carbon atoms are bonded in a nearly spherical configuration. The connective eccentric index of graph G is defined as C (G)= Σa V(G)deg(a)ε(a) -1, ...

  • Hosoya index and Fibonacci numbers 

    Alikhani, Saeid (Shahid Rajaee Teacher Training University, 2011-06-01)
    Let G =(V ,E) be a simple graph. The Hosoya index Z(G) of G is defined as the total number of edge independent sets of G . Fibonacci numbers are terms of the sequence defined in a quite simple recursive fashion. In this ...

  • Szeged index of bipartite unicyclic graphs 

    Dong, Hui؛ Zhou, Bo (Shahid Rajaee Teacher Training University, 2011-06-01)
    The Szeged index of a connected graph G is defined as the sum of products n1(e|G)n2(e|G) over all edges e = uv of G where n1(e|G) and n2(e|G) are respectively the number of ...

  • On Zagreb indices of pseudo-regular graphs 

    Reti, Tamas؛ Gutman, Ivan؛ Vukicevic, Damir (Shahid Rajaee Teacher Training University, 2011-06-01)
    Properties of the Zagreb indices of pseudo-regular graphs are established, with emphasis on the Zagreb indices inequality. The relevance of the results obtained for the theory of nanomolecules is pointed out.