Kleene star
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Kleene star — In mathematical logic and computer science, the Kleene star (or Kleene closure) is a unary operation, either on sets of strings or on sets of symbols or characters. The application of the Kleene star to a set V is written as V *. It is widely… … Wikipedia
Kleene Star — Die Kleenesche Hülle (auch endlicher Abschluss, Kleene * Abschluss oder Verkettungshülle genannt) eines Alphabets Σ oder einer formalen Sprache L ist die Menge aller Wörter, die durch beliebige Konkatenation (Verknüpfung) von Symbolen des… … Deutsch Wikipedia
Kleene algebra — In mathematics, a Kleene algebra (named after Stephen Cole Kleene, IPAEng|ˈkleɪni as in clay knee ) is either of two different things:* A bounded distributive lattice with an involution satisfying De Morgan s laws, and the inequality x ∧− x ≤ y… … Wikipedia
Star (disambiguation) — A star is a luminous cosmic body. For uses of stars as a symbol, see List of symbolic stars.Star or stars may also refer to:Places*Star Mountains, a mountain range in Papua New GuineaUnited Kingdom*Star, Anglesey, Wales *Star, Fife, Scotland… … Wikipedia
Star height problem — The star height problem in formal language theory is the question whether all regular languages can be expressed using regular expressions of limited star height, i. e. with a limited nesting depth of Kleene stars. Specifically, is a nesting… … Wikipedia
Star-free language — A regular language is said to be star free if it can be described by a regular expression constructed from the letters of the alphabet, the empty set symbol, boolean operators and concatenation but no Kleene star. For instance, the language of… … Wikipedia
Stephen Cole Kleene — Infobox Scientist name = Stephen Kleene caption = birth date = birth date|1909|1|5 birth place = USA death date = death date and age|1994|1|25|1909|1|5 death place = residence = USA nationality = USA field = Mathematics work institutions =… … Wikipedia
Generalized star height problem — The generalized star height problem in formal language theory is the open question whether all regular languages can be expressed using regular expressions with a built in complement operator of limited star height, i. e. with a limited nesting… … Wikipedia
Fermeture De Kleene — Pour les articles homonymes, voir Fermeture. La fermeture de Kleene, parfois appelée étoile de Kleene ou encore fermeture itérative, est un opérateur unaire utilisé pour décrire les langages formels. Appliquée à un ensemble V, elle a pour… … Wikipédia en Français
Fermeture de kleene — Pour les articles homonymes, voir Fermeture. La fermeture de Kleene, parfois appelée étoile de Kleene ou encore fermeture itérative, est un opérateur unaire utilisé pour décrire les langages formels. Appliquée à un ensemble V, elle a pour… … Wikipédia en Français
