\CapThe \Cap operator is used to denote the intersection of multiple sets. It is a binary operator that returns a set containing all elements that are common to all the sets being intersected.
Intersection of sets A and B
A \Cap BIntersection of a collection of sets A_i from i=1 to n
\bigcap_{i=1}^{n} A_iIntersection of sets A, B, and C
(A \Cap B) \Cap C