University of Kashan Iranian Journal of Mathematical Chemistry 2228-6489 9 2 2018 06 01 On the Eigenvalues of some Matrices based on Vertex Degree 149 156 63465 10.22052/ijmc.2017.93637.1303 EN S. Zangi Department of Mathematics, Shahid Rajaee Teacher Training University M. Ghorbani Department of mathematics, Shahid Rajaee Teacher Training University M. Eslampour Department of Mathematics, Shahid Rajaee Teacher Training University Journal Article 2017 07 26 The aim of this paper is to compute some bounds of forgotten index and then we present spectral properties of this index. In continuing, we define a new version of energy namely ISI energy corresponded to the ISI index and then we determine some bounds for it. Zagreb indices forgotten index ISI index energy of graph https://ijmc.kashanu.ac.ir/article_63465_857967802a59a68b050043de1148f170.pdf