Columbia subject headings:
CW complexes.
Manifolds (Mathematics)
Topological imbeddings.
Topological transformation groups.
Harvard subject headings:
CW complexes.
Group actions (Mathematics)
Manifolds (Mathematics)
Topological imbeddings.
Topological transformation groups.
Princeton subject headings:
CW complexes.
Manifolds (Mathematics)
Topological imbeddings.
Topological transformation groups.