SEARCH Articles Figures Tables Avoiding the Diagonalization Step—Density Matrix-Based SCF Density Matrix of Crystals in the Hartree-Fock Method Density matrix Equation of motion for the density matrix Evolution of the Density Matrix Expansion of the density matrix in Matrix, The Notations for the Density Matrix and Its Subsets Properties of the Density Matrix Properties of the One-Particle Density Matrix The Density Matrix Representation of Spin States The density The density matrix approach The density matrix for a pure system The first-order density matrix The one-electron density matrix The two-electron density matrix