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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 depth of one always sufficient? If not, is there an algorithm to determine how many are required? The problem was…

Computing the star height of regular languages, Families of regular languages with unbounded star height & Overview

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Computing the star height of regular languages

Pure-group languagesDecidableHashiguchiElementaryDecimal notation
8 related topics

Families of regular languages with unbounded star height

Salomaa (1981)AlphabetInductively defined
3 related topics

Overview

Formal language theoryRegular languagesRegular expressionsStar heightKleene stars
6 related topics

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Families of regular languages with unbounded star height

Computing the star height of regular languages

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Star height problem

Nodes21
Edges20
Triples68
Avg. degree1.9
Density0.095238
Components1

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Star height problem

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related to Further reading · 55
Star height problem → Algorithms, Applications, Arnaud, Automata Theory, Cambridge, Cambridge University Press, Carayol, Cham, CIAA, Computation, Computer Science, Control, Cyril, Daniel, Denis, Determining Relative Star Height, Distance Desert Automata, Edon, Elements, Fijalkow
related to Computing the star height of regular languages · 12
Star height problem → But, For, Hashiguchi, In, LATIN, Lombardy, Reversible Languages, Sakarovitch, Star Height, The, To, Universal Automata
see also · 1
Star height problem → Generalized

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star height regular 10 languages doi algorithm language problem theory isbn eggan displaystyle hashiguchi examples automata formal question expressions first

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SubjectPredicateObjectConfidenceSrc
Star height problemrelated to Computing the star height of regular languagesIn0.60section
Star height problemrelated to Computing the star height of regular languagesFor0.60section
Star height problemrelated to Computing the star height of regular languagesThe0.60section
Star height problemrelated to Computing the star height of regular languagesBut0.60section
Star height problemrelated to Computing the star height of regular languagesHashiguchi0.60section
Star height problemrelated to Computing the star height of regular languagesTo0.60section
Star height problemrelated to Computing the star height of regular languagesLombardy0.60section
Star height problemrelated to Computing the star height of regular languagesSakarovitch0.60section
Star height problemrelated to Computing the star height of regular languagesStar Height0.60section
Star height problemrelated to Computing the star height of regular languagesReversible Languages0.60section
Star height problemrelated to Computing the star height of regular languagesUniversal Automata0.60section
Star height problemrelated to Computing the star height of regular languagesLATIN0.60section

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