Cartesian product [SEP] named after
If the Cartesian product is taken, the cells of the table contain ordered pairs of the form .
More generally, a Cartesian product of "n" sets, also known as an "n"-fold Cartesian product, can be represented by an array of "n" dimensions, where each element is an "n"-tuple. An ordered pair is a 2-tuple or couple.
The Cartesian product is named after René Descartes, whose formulation of analytic geometry gave rise to the concept, which is further generalized in terms of direct product
Clifford torus
In geometric topology, the Clifford torus is the simplest and most symmetric Euclidean space embedding of the cartesian product of two circles "S" and "S". It is named after William Kingdon Clifford. It resides in R, as opposed to in R. To see why R is necessary, note that if "S" and "S" each exist in their own independent embedding spaces R and R, the resulting product space will be R rather than R. The historically popular view that the cartesian product of