SET OPERATIONS/SET THEORETICAL NOTATIONS
The union of two sets P and Q is a set containing all elements that are in P or in Q (possibly both). It is denoted by P∪Q.
The intersection of two sets P and Q, denoted by P∩Q, consists of all elements that are both in P and Q.
The difference (subtraction) is defined as follows. The set P−Q consists of elements that are in P but not in Q.
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