• Mostar index and edge Mostar index of polymers 

      Ghanbari, Nima; Alikhani, Saeid (Journal article; Peer reviewed, 2021)
      Let G=(V,E) be a graph and e=uv∈E. Define nu(e,G) be the number of vertices of G closer to u than to v. The number nv(e,G) can be defined in an analogous way. The Mostar index of G is a new graph invariant defined as ...
    • On the Sombor characteristic polynomial and Sombor energy of a graph 

      Ghanbari, Nima (Journal article; Peer reviewed, 2022)
      Let G be a simple graph with vertex set V(G)={v1,v2,…,vn}. The Sombor matrix of G, denoted by ASO(G), is defined as the n×n matrix whose (i, j)-entry is d2i+d2j−−−−−−√ if vi and vj are adjacent and 0 for another cases. Let ...