Definition:Cartesian Product/Family of Sets

Uncountable Cartesian Product
Using this notation, it is then possible to define the Cartesian product of an uncountable family:

Also denoted as
Some sources use $\def \bigtimes {\mathop {\vcenter {\huge \times} } } \bigtimes_{i \mathop \in I} S_i$ for $\displaystyle \prod_{i \mathop \in I} S_i$.

Also see

 * Equivalence of Definitions of Cartesian Product of Indexed Family


 * Equivalence of Versions of Axiom of Choice