In physics and mathematics, the dimension of a space's roughly defined as the minimum number of coordinates needed to specify every point within it. For example: a point on the unit circle in the plane can be specified by two Cartesian coordinates but one can make do with a single coordinate (the polar coordinate angle), so the circle's 1-dimensional even though it exists in the 2-dimensional plane. This intrinsic notion of dimension's one of the chief ways in which the mathematical notion of… (More on Dimension)