411 REFERENCE · Wiktionary
Kleene plus
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
After Stephen Cole Kleene (1909-1994), American mathematician.
Noun
en logic computing theory The plus symbol, +, used as an operator to concatenate one or more strings from a given set, widely used in regular expressions.
en Kleene star
en eponyms
en Regular expressions