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Title:The distinguishing chromatic number of Cartesian products of two complete graphs
Authors:ID Jerebic, Janja (Author)
ID Klavžar, Sandi (Author)
Files:URL http://dx.doi.org/10.1016/j.disc.2009.11.021
 
Language:English
Work type:Article
Typology:1.08 - Published Scientific Conference Contribution
Organization:FNM - Faculty of Natural Sciences and Mathematics
Abstract:Označitev grafa ▫$G$▫ je razlikovalna, če jo ohranja le trivialni avtomorfizem grafa ▫$G$▫. Razlikovalno kromatično število grafa ▫$G$▫ je najmanjše naravno število, za katero obstaja razlikovalna označitev grafa, ki je hkrati tudi dobro barvanje. Za vse ▫$k$▫ in ▫$n$▫ je določeno razlikovalno kromatično število kartezičnih produktov ▫$K_kBox K_n$▫. V večini primerov je enako kromatičnemu številu, kar med drugim odgovori na vprašanje Choia, Hartkeja and Kaula, ali obstajajo še kakšni drugi grafi, za katere velja enakost.
Keywords:teorija grafov, razlikovalno kromatično število, grafovski avtomorfizem, kartezični produkt grafov, graph theory, distinguishing chromatic number, graph automorphism, Cartesian product of graphs
Publication status:Published
Publication version:Version of Record
Year of publishing:2010
Number of pages:Str. 1715-1720
PID:20.500.12556/DKUM-51858 New window
UDC:519.17
ISSN on article:0012-365X
COBISS.SI-ID:15552601 New window
NUK URN:URN:SI:UM:DK:BQHDVVNR
Publication date in DKUM:10.07.2015
Views:1373
Downloads:99
Metadata:XML DC-XML DC-RDF
Categories:Misc.
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Record is a part of a proceedings

Title:Algebraic and topological graph theory
COBISS.SI-ID:15551833 New window

Record is a part of a journal

Title:Discrete mathematics
Shortened title:Discrete math.
Publisher:North-Holland
ISSN:0012-365X
COBISS.SI-ID:1118479 New window

Secondary language

Language:Slovenian
Title:Razlikovalno kromatično število kartezičnega produkta dveh polnih grafov
Abstract:A labeling of a graph ▫$G$▫ is distinguishing if it is only preserved by the trivial automorphism of ▫$G$▫. The distinguishing chromatic number of ▫$G$▫ is the smallest integer ▫$k$▫ such that ▫$G$▫ has a distinguishing labeling that is at the same time a proper vertex coloring. The distinguishing chromatic number of the Cartesian product $K_kBox K_n$ is determined for all ▫$k$▫ and ▫$n$▫. In most of the cases it is equal to the chromatic number, thus answering a question of Choi, Hartke and Kaul whether there are some other graphs for which this equality holds.


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