Columbia subject headings:
Categories (Mathematics)--Congresses.
Geometry, Algebraic--Congresses.
Logic, Symbolic and mathematical--Congresses.
Toposes.
Harvard subject headings:
Categories (Mathematics)--Congresses.
Geometry, Algebraic--Congresses.
Logic, Symbolic and mathematical--Congresses.
Toposes.
Princeton subject headings:
Categories (Mathematics)--Congresses.
Geometry, Algebraic--Congresses.
Logic, Symbolic and mathematical--Congresses.
Toposes.