Category:Torus (Topology)

This category contains results about Torus in the context of Topology.
Definitions specific to this category can be found in Definitions/Torus (Topology).

A torus is a surface obtained by identifying both pairs of opposite sides, one with the other, of a square, while retaining the orientation:

Thus in the above diagram, $AB$ is identified with $DC$ and $CB$ with $DA$.