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The set union symbol, also called the cup symbol, represents the union operator in set theory. For example, the union of the two sets A and B is represented as:
This would be said as the union of A and B.
The cap symbol is used in mathematics as the set intersection operator. It also is used in probability to represent the occurence of two events.
The set union operation is denoted using the cup symbol. The union of two sets returns the combined elements of both sets. Duplicates are ignored.