摘要: The application of the diagrammatic many-body perturbation theory to problem molecular electronic structure is described. An overview basic formalism and properties method given together with a discussion various aspects truncation expansion, emphasizing particularly, systematic nature theoretic approach. use in analysis many techniques currently employed handle correlation molecules briefly considered. main emphasis this review on computational theory. Programs written for serial computers are described it demonstrated that algorithms based both accurate efficient. importance Wigner’s (2n+1) rule noted. impact parallel processing pertur- bative calculations assessed. outline some current research atoms presented.