TABLE OF CONTENTS | A | vector potential | |
| A | mass number | |
| Ai( y) | Airy function | |
| a | acceleration | |
| a, b, c | basic vectors of the lattice | |
| a *, b *, c * | basic vectors of the reciprocal lattice | |
| a, b, c | lattice constants | |
| a 0 | Bohr radius | |
| B | magnetic induction | |
| B | bandwidth | |
| B s( x) | Brillouin function | |
| C | cyclic group | |
| C e | electronic specific heat capacity | |
| C p | specific heat capacity at constant pressure | |
| c | speed of light in vacuum | |
| D | electric displacement | |
| D | diffusion coefficient | |
| D | fractal (or Hausdorff) dimension | |
| D | dihedral group | |
| d | lattice spacing | |
| d | Euclidean dimension | |
| d t | topological dimension | |
| E = ? e | electric field | |
| E | energy | |
| E( k) | dispersion relation | |
| E c | mobility edge | |
| E F | Fermi energy | |
| E g | band gap energy | |
| E k | kinetic energy | |
| E ex | exchange energy | |
| E xc | exchange-correlation energy | |
| e | unit vector | |
| e | electronic charge | |
| e = 2.71828 | base for natural logarithm | |
| e ? | eccentricity | |
| F | force | |
| F | Helmholtz free energy | |
| f | Helmholz free energy density | |
| f( E) | Fermi distribution function | |
| f c | covering density | |
| f p | packing density | |
 | symmetry group | |
| G | reciprocal lattice vector | |
| G( r, r ?) | Green's function | |
| G |
