\bigcapThe \bigcap operator represents the intersection of a collection of sets. It is used in mathematics to denote the common elements shared by all sets in the collection.
Intersection of a sequence of sets A_1, A_2, ..., A_n.
\bigcap_{i=1}^{n} A_iIntersection of sets S_x for each element x in the set X.
\bigcap_{x \in X} S_xIntersection of an infinite sequence of sets I_1, I_2, ..., I_k.
\bigcap_{k=1}^{\infty} I_k