Columbia subject headings:
Hilbert space.
Operator theory.
Quantum field theory--Mathematical models.
Harvard subject headings:
Bose algebras.
Global analysis (Mathematics).
Hilbert space.
Mathematical physics.
Mathematics.
Operator theory.
Quantum field theory--Mathematical models.
Representations of groups.
Princeton subject headings:
Hilbert space.
Operator theory.
Quantum field theory--Mathematical models.