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Title:Guarded subgraphs and the domination game
Authors:ID Brešar, Boštjan (Author)
ID Klavžar, Sandi (Author)
ID Košmrlj, Gašper (Author)
ID Rall, Douglas F. (Author)
Files:.pdf Discrete_Mathematics_&_Theoretical_Computer_Science_2015_Bresar_et_al._Guarded_subgraphs_and_the_domination_game.pdf (690,85 KB)
MD5: 644B1ECC1DD7E3BDDE818323DE99332E
 
URL http://dmtcs.episciences.org/2123
 
Language:English
Work type:Scientific work
Typology:1.01 - Original Scientific Article
Organization:FNM - Faculty of Natural Sciences and Mathematics
Abstract:V članku vpeljemo koncept zaščitenega podgrafa. Množica le-teh po definicji leži med množico konveksnih in 2-izometričnih podgrafov, hkrati pa ni primerljiva z množico izometričnimih podgrafov. Dokažemo nekatere metrične lastnosti zaščitenih podgrafov ter koncept uporabimo v dominacijski igri, v kateri dva igralca, Dominator in Zavlačevalka, izmenično izbirata vozlišča grafa, tako da vsako izbrano vozlišče poveča množico dominiranih vozlišč. Dominatorjev cilj je končati igro, tj. dominirati celoten graf, čim hitreje, medtem ko je Zavlačevalkin cilj odigrati čim več potez. Igralno dominacijsko število je število potez v igri, ko Dominator začne in oba igralca igrata optimalno. Kot glavni rezultat članka dokažemo, da igralno dominacijsko število grafa ni nikoli manjše, kot igralno dominacijsko število njegovega zaščitenega podgrafa. Predstavljenih je tudi več aplikacij tega rezultata.
Keywords:dominacijska igra, igralno dominacijsko številko, konveksni podgraf, (2-)izometrični podgraf
Publication status:Published
Publication version:Version of Record
Article acceptance date:08.06.2014
Publication date:12.02.2015
Publisher:Discrete Mathematics & Theoretical Computer Science
Year of publishing:2015
Number of pages:Str. 161-168
Numbering:Letn. 17, št. 1
PID:20.500.12556/DKUM-59258 New window
ISSN:1365-8050
UDC:519.17
ISSN on article:1365-8050
COBISS.SI-ID:17273689 New window
NUK URN:URN:SI:UM:DK:B52WXJ2D
Publication date in DKUM:10.07.2017
Views:1683
Downloads:261
Metadata:XML DC-XML DC-RDF
Categories:Misc.
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Record is a part of a journal

Title:Discrete mathematics & theoretical computer science
Shortened title:Discret. math. theor. comput. sci.
Publisher:DMTCS
ISSN:1365-8050
COBISS.SI-ID:8089433 New window

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Project number:P1-0297
Name:Teorija grafov

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:11.05.2016

Secondary language

Language:Slovenian
Title:Zaščiteni podgrafi in dominacijska igra
Abstract:We introduce the concept of guarded subgraph of a graph, which as a condition lies between convex and 2-isometric subgraphs and is not comparable to isometric subgraphs. Some basic metric properties of guarded subgraphs are obtained, and then this concept is applied to the domination game. In this game two players, Dominator and Staller, alternate choosing vertices of a graph, one at a time, such that each chosen vertex enlarges the set of vertices dominated so far. The aim of Dominator is that the graph is dominated in as few steps as possible, while the aim of Staller is just the opposite. The game domination number is the number of vertices chosen when Dominator starts the game and both players play optimally. The main result of this paper is that the game domination number of a graph is not smaller than the game domination number of any guarded subgraph. Several applications of this result are presented.
Keywords:domination game, game domination number, convex subgraph, (2-)isometric subgraph


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