Set Theoryhard
0:00.0

Let {Ai}iI\{A_i\}_{i \in I} and {Bj}jJ\{B_j\}_{j \in J} be two families of subsets of a universal set UU. Which of the following is equivalent to the set difference of their unions, (iIAi)(jJBj)\left( \bigcup_{i \in I} A_i \right) \setminus \left( \bigcup_{j \in J} B_j \right)?