So there is actually a four-dimensional space of Clifford tori.

Although the space we live in is considered three-dimensional, there are practical applications for four-dimensional space.

In particular a vector with four elements (a 4-tuple) can be used to represent a position in four-dimensional space.

Starting from four-dimensional space, point groups also can be enantiomorphic in this sense.

A general rotation in four-dimensional space has only one fixed point, the origin.

The concept of a four-dimensional space is hard to visualise.

I think, though, and hope, that we are in another four-dimensional space.

Any method we use to move through three- or four-dimensional space is a game.

However, such calculations are demanding because the equations must generally be solved in a four-dimensional space.

They were soon to learn, however, that the denizens of this city of four-dimensional space had not yet given up the chase.