Linked from
The 11 pages that link to Product topology, each with the reason it gives.
HomotopyRelated: A homotopy is a continuous map on the product of a space with an interval.
Subspace topologyRelated: Subspaces of products inherit open sets from the product topology.
Tychonoff's theoremBroader topic: It is the topology in which Tychonoff’s product remains compact.
Basis (topology)Broader topic: Its basis makes neighborhoods in large products precise.
Tube lemmaRelated: Basic open rectangles provide the local neighborhoods used in the proof.