Group isomorphic to its square

Definition
A group isomorphic to its square is a group with the property that it is isomorphic to its square, i.e., its defining ingredient::external direct product with itself.

Stronger properties

 * Weaker than::Infinite restricted direct power of a group
 * Weaker than::Infinite direct power of a group
 * Weaker than::Group isomorphic to a positive power