User:Jshflynn/Definition:Kleene plus
Jump to navigation
Jump to search
Definition
Let $\Sigma$ be an alphabet.
Let $V$ be a subalphabet of $\Sigma$.
Then the Kleene plus of $V$ is denoted $V^+$ and defined:
- $\ds \bigcup_{i \mathop \in \N_{>0} } V^i$
Also known as
Some authors call this:
- Semigroup closure