Definition: Mutually Disjoint Sets
An family of sets \(X_{i},i\in I,\) is called mutually disjoint (or pairwise disjoint), if for all \(i,j\in I\), \(i\neq j\), \(X_{i}\cap X_{j}=\emptyset .\)
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References
Adapted from CC BYSA 3.0 Sources:
 Brenner, Prof. Dr. rer. nat., Holger: Various courses at the University of Osnabrück