# Kleene plus

> unary operation on sets of strings, used in regular expressions for "one or more repetitions"

**Wikidata**: [Q87913369](https://www.wikidata.org/wiki/Q87913369)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Kleene_plus)  
**Source**: https://4ort.xyz/entity/kleene-plus