Research On Several Types Of Coronal Energy

Graph energy is an important research field of graph spectrum theory.There is a close relationship between the graph energy and molecular graph chemical properties.In chemical graph theory,It's origin connected with the total?-electron energy of Hückel a molecule orbital approximation.There is a close relationship between the graph energy and the eigenvalues of its adjacency matrix.The corona of ??? is obtained by connecting each vertex of G₁ to all vertices of a copy of G₂.In this paper,the energy of corona is studied by the relation between energy and eigenvalue of matrix.The first chapter,we introduced the research background of graph energy,gave some basic knowledge and research status,and explained the main conclusions of this paper.The second chapter,The Randi?energy,the first and second Zagreb energy and Harmonic energy of two kinds of corona are studied by using the method of transforming the high-order matrix into the low-order matrix to find spectrum,and the specific energy values are obtained.The third chapter,the specific value of Path energy of ??? and the value range of Path energy of ???.