Geometrically Closed Positive Varieties of Star-Free Languages
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F20%3A00114218" target="_blank" >RIV/00216224:14310/20:00114218 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/chapter/10.1007%2F978-3-030-40608-0_23" target="_blank" >https://link.springer.com/chapter/10.1007%2F978-3-030-40608-0_23</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/978-3-030-40608-0_23" target="_blank" >10.1007/978-3-030-40608-0_23</a>
Alternative languages
Result language
angličtina
Original language name
Geometrically Closed Positive Varieties of Star-Free Languages
Original language description
A recently introduced operation of geometrical closure on formal languages is investigated. It is proved that the geometrical closure of a language from the positive variety V_3/2, the level 3/2 of the Straubing-Thérien hierarchy of star-free languages, always falls into the variety R_LT, which is a new variety consisting of specific R-trivial languages. As a consequence, each class of regular languages lying between R_LT and V_3/2 is geometrically closed.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)
Result continuities
Project
<a href="/en/project/GA19-12790S" target="_blank" >GA19-12790S: Effective characterizations of classes of finite semigroups and formal languages</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
LATA 2020
ISBN
9783030406073
ISSN
0302-9743
e-ISSN
1611-3349
Number of pages
13
Pages from-to
328-340
Publisher name
Springer
Place of publication
Cham
Event location
Miláno, Itálie
Event date
Mar 4, 2020
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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