The set of elements common to two or more sets WordNet 3.0 & Open English WordNet

In set theory, the intersection of two sets A {\displaystyle A} and B, {\displaystyle B,} denoted by A ∩ B, {\displaystyle A\cap B,} is the set containing all elements of A {\displaystyle A} that also belong to B {\displaystyle B} or equivalently, all elements of B {\displaystyle B} that also belong to A. Wikipedia

The set of elements common to some collection of sets Wikipedia Disambiguation

Concept in mathematics specific to the field of set theory Wikidata

The set of all possible pairs of elements whose components are members of two sets. Notation: X × Y = { ( x , y ) ‖ x ∈ X ∧ y ∈ Y } . Wiktionary

Set of possible pairs. Wiktionary (translation)

The topology of the Cartesian product of two or more topological spaces which is generated from a basis whose elements are Cartesian products of open subsets of the original spaces, such that for each such Cartesian product only a finite quantity of such subsets are proper. Wiktionary