Singleton Set

A set having exactly one element . A singleton set is denoted by and is the simplest example of a nonempty set.

See also

Empty Set, Nonempty Set, Singleton Function

This entry contributed by Margherita Barile

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Cite this as:

Weisstein, Eric W., with contributions by Margherita Barile. "Singleton Set." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/SingletonSet.html

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