Empty set
From AoPSWiki
The empty set (generally denoted
or
) is the (unique) set containing no elements. It is therefore a subset of every set.
This article is a stub. Help us out by expanding it.
The empty set (generally denoted
or
) is the (unique) set containing no elements. It is therefore a subset of every set.
This article is a stub. Help us out by expanding it.

