The Emperor's New Mind: Concerning Computers, Minds, and the Laws of Physics (Oxford Landmark Science)

by Roger Penrose

Try to imagine a ‘space’ of a large number of dimensions, one dimension for each of the coordinates x1, x2, . . ., p1, p2, . . . (Mathematical spaces often have many more than three dimensions.) This space is called phase space (see Fig. 5.10).