Electronic density of states Mathematical models 10 Approximation theory 8 Phase transitions 8 Band structure 6 Electronic structure 6 Calculations 4 Computer simulation 4 Crystal lattices 4 Energy gap 4 Fermi level 4 Helium 4 Ions 4 Probability density function 4 Vectors 4 A. Insulators 2 A. Metals 2 A. Nanostructures 2 Adsorption 2 Alloys 2 Andreev states 2 Atomic physics 2 Atoms 2 B3LYP 2 Binaries 2 Binaries - Stars 2 Binaries-stars 2 Binary electron contribution 2 Bose-Einstein condensation 2 Bosons 2