Aspects of density functional theory

Several recent developments in the density functional theory of electronic systems are described, with emphasis on work done at the University of North Carolina at Chapel Hill. Definitions are given of various key physical concepts, a certain conjointness is revealed between kinetic energy and exchange energy functionals, and a unique method is demonstrated that allows one to find the electronic wavefunction that goes with a given ground-state electron density. An optimistic opinion is stated about the future of the subject.