%0 Journal Article
%T The Minimum Estrada Index of Spiro Compounds with k Quadrangles
%J Iranian Journal of Mathematical Chemistry
%I University of Kashan
%Z 2228-6489
%A Iranmanesh, Mohammad Ali
%A Nejati, Razieh
%D 2019
%\ 09/01/2019
%V 10
%N 3
%P 241-249
%! The Minimum Estrada Index of Spiro Compounds with k Quadrangles
%K Strada index
%K spiro compound
%K point attaching graph
%R 10.22052/ijmc.2019.149094.1392
%X Abstract. Let G = (V,E) be a finite 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.
%U https://ijmc.kashanu.ac.ir/article_101892_5182c0c753fd3b745f298069defce2ad.pdf