Columbia subject headings:
Algebraic varieties--Congresses.
Invariants--Congresses.
Transformation groups--Congresses.
Harvard subject headings:
Algebraic varieties--Congresses.
Invariants--Congresses.
Transformation groups--Congresses.
Princeton subject headings:
Algebraic varieties--Congresses.
Invariants--Congresses.
Transformation groups--Congresses.