SEARCH Articles Figures Tables Bloch Sum Basis Set - The LCAO Method Ewald sum methods Molecular orbital method and sum-over-states perturbation theory Sum Over States methods Sum Peak Method Sum and Projection Methods Sum-Rates (SR) Method Sum-Rates or Absorber-Oriented Methods Sum-rates methods The SR (Sum-Rates) Method Time-Dependent Perturbation Theory The Sum over States Method Weighted sum method