Definition of

Intersection (sets)

intersection of two sets
The intersection of two sets A and B is the set of elements that are in both A and B.

The symbol is an upside down U like this:

Example: The intersection of the "Soccer" and "Tennis" sets is just casey and drew (only casey and drew are in both sets), which can be written:

Soccer ∩ Tennis = {casey, drew}
See: Union

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