Columbia subject headings:
Energy-band theory of solids.
Green's functions.
Many-body problem.
Solids--Optical properties.
Harvard subject headings:
Energy-band theory of solids.
Green's functions.
Many-body problem.
Solids--Optical properties
Princeton subject headings:
Energy-band theory of solids.
Green's functions.
Many-body problem.
Solids--Optical properties.