Smooth Approximations and Relational Width Collapses

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F21%3A10437369" target="_blank" >RIV/00216208:11320/21:10437369 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.4230/LIPIcs.ICALP.2021.138" target="_blank" >https://doi.org/10.4230/LIPIcs.ICALP.2021.138</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.4230/LIPIcs.ICALP.2021.138" target="_blank" >10.4230/LIPIcs.ICALP.2021.138</a>

Result language
angličtina
Original language name
Smooth Approximations and Relational Width Collapses
Original language description
We prove that relational structures admitting specific polymorphisms (namely, canonical pseudoWNU operations of all arities n >= 3) have low relational width. This implies a collapse of the bounded width hierarchy for numerous classes of infinite-domain CSPs studied in the literature. Moreover, we obtain a characterization of bounded width for first-order reducts of unary structures and a characterization of MMSNP sentences that are equivalent to a Datalog program, answering a question posed by Bienvenu et al.. In particular, the bounded width hierarchy collapses in those cases as well.
Czech name
—
Czech description
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Project
<a href="/en/project/GA18-20123S" target="_blank" >GA18-20123S: Expanding the Scope of Universal Algebra</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Leibniz International Proceedings in Informatics, LIPIcs
ISBN
978-3-95977-195-5
ISSN
1868-8969
e-ISSN
—
Number of pages
20
Pages from-to
1-20
Publisher name
Schloss Dagstuhl
Place of publication
Německo
Event location
Skotsko
Event date
Jul 12, 2021
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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