TY - JOUR KW - paper AU - Olivia Pulci AU - Margherita Marsili AU - E Luppi AU - Conor Hogan AU - V. Garbuio AU - Francesco Sottile AU - R Magri AU - Rodolfo Del Sole AB - Theoretical approaches for ab initio studies of the electronic and optical properties of matter are here reviewed. Examples within Density Functional Theory, Many-Body perturbation Theory and Time Dependent Density Functional Theory are presented and discussed, pointing out advantages and drawbacks of the different schemes. (c) 2005 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim. BT - PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS DO - 10.1002/pssb.200541115 M1 - 13 N2 - Theoretical approaches for ab initio studies of the electronic and optical properties of matter are here reviewed. Examples within Density Functional Theory, Many-Body perturbation Theory and Time Dependent Density Functional Theory are presented and discussed, pointing out advantages and drawbacks of the different schemes. (c) 2005 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim. PY - 2005 SP - 2737 EP - 2750 T2 - PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS TI - Electronic excitations in solids: Density functional and Green\textquoterights function theory UR - http://dx.doi.org/10.1002/pssb.200541115 VL - 242 SN - 0370-1972 ER -