Suspension (topology)
（重定向自Suspension functor）
![Suspension of a circle. The original space is in blue, and the collapsed end points are in green.](/Images/godic/202502/14/Suspension.svg4250.png")
In topology, the suspension SX of a topological space X is the quotient space:
of the product of X with the unit interval I = [0, 1]. Thus, X is stretched into a cylinder and then both ends are collapsed to points. One views X as "suspended" between the end points. One can also view the suspension as two cones on X glued together at their base (or as a quotient of a single cone).