When a player wins all sets in a match, it is referred to as a "straight sets" victory. In tennis, this means the player has won the match without allowing their opponent to win a single set, typically resulting in a score such as 6-0, 6-1, or 6-2. This term can also apply to other sports with a set-based scoring system.
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The set of elements that are elements of the two (or more) given sets is called the intersection of the sets.
The combination of two sets is the Union of the sets and contains all the elements of both sets.
Add up all the values in the sets
That is a parallelogram; it could also be called a diamond shape.
This is called a discrete set (all points isolated) or a finite set. Finite sets are always discrete.