The Minimum Estrada Index of Spiro Compounds with k Quadrangles

Author(s):

Mohammad Iranmanesh * , Razieh Nejati

Message:
Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:

 Let G = (V,E) be a fi nite and simple graph with λ1, λ2,...,λn as its eigenvalues.The Estrada index of G is EE(G) =∑ni=1e^{λi} . A spiro compound is a chemical compound that presents a twisted structure of two or more rings, in which 2 or 3 rings are linked together by one common atom. In this paper, we show that the symmetric and stable spiro compounds among all spiro compounds have the minimum Estrada index.

Keywords:

Strada index , spiro compound , point attaching graph

Language:
English
Published:
Iranian Journal of Mathematical Chemistry, Volume:10 Issue: 3, Summer 2019
Pages:
241 to 249
https://www.magiran.com/p2079271