SEARCH Articles Figures Tables Correlated electrons Correlation electron Density functional theory electron correlation procedures Electron correlation method Density-functional theory Mpller-Plesset Electron correlation method, Density-functional theory Electron density Wigner correlation energy functional Electron functionalization Electron-correlated calculations, nuclear density functional theory Electronic correlations Electronic structure methods exchange-correlation functional Gaussian basis functions electron correlation effects Hyperpolarizabilities electron-correlated functions Multi-determinant wave functions electron correlation methods Multiconfigurational wave function electron correlation Structure-Function Correlations Electron Transfer Chain The pair function. Electron correlation Vosko, Wilk and Nusair electron correlation functional