Two sets and are disjoint if their intersection , where is the empty set. sets , , ..., are disjoint if for . For example, and are disjoint, but and are not. Disjoint sets are also said to be mutually exclusive or independent.
Disjoint Sets
See also
Empty Set, Independent Set, Intersection, SetExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Disjoint Sets." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/DisjointSets.html