KUNC, Michal. The power of commuting with finite sets of words. In STACS 2005: 22nd Annual Symposium on Theoretical Aspects of Computer Science, Stuttgart, Germany, February 24-26, 2005. Proceedings. Berlin: Springer-Verlag, 2005, p. 569-580. ISBN 3-540-24998-2.
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Basic information
Original name The power of commuting with finite sets of words
Name in Czech Síla komutování s konečnými množinami slov
Authors KUNC, Michal (203 Czech Republic, guarantor).
Edition Berlin, STACS 2005: 22nd Annual Symposium on Theoretical Aspects of Computer Science, Stuttgart, Germany, February 24-26, 2005. Proceedings, p. 569-580, 2005.
Publisher Springer-Verlag
Other information
Original language English
Type of outcome Proceedings paper
Field of Study 10101 Pure mathematics
Country of publisher Germany
Confidentiality degree is not subject to a state or trade secret
WWW URL
RIV identification code RIV/00216224:14310/05:00013633
Organization unit Faculty of Science
ISBN 3-540-24998-2
UT WoS 000229009500047
Keywords in English Commutation of languages; Language equation; Regular language; Recursively enumerable language; Minsky machine
Tags Commutation of languages, Language equation, Minsky machine, Recursively enumerable language, Regular language
Changed by Changed by: doc. Mgr. Michal Kunc, Ph.D., učo 2906. Changed: 23/1/2006 14:55.
Abstract
We show that one can construct a finite language L such that the largest language commuting with L is not recursively enumerable. This gives a negative answer to the question raised by Conway in 1971 and also strongly disproves Conway's conjecture on context-freeness of maximal solutions of systems of semi-linear inequalities.
Abstract (in Czech)
V práci ukazujeme, že lze zkonstruovat konečný jazyk L takový, že největší jazyk komutující s L není rekurzívně vyčíslitelný. Tímto dáváme negativní odpověď na otázku, kterou položil Conway v roce 1971, a rovněž silně vyvracíme jeho hypotézu, že maximální řešení systémů pololineárních nerovnic jsou bezkontextová.
Links
MSM 143100009, plan (intention)Name: Matematické struktury algebry a geometrie
Investor: Ministry of Education, Youth and Sports of the CR, Mathematical structures of algebra and geometry
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