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Title:Harmonično barvanje dreves
Authors:ID Žnidarič, Luka (Author)
ID Jakovac, Marko (Mentor) More about this mentor... New window
Files:.pdf MAG_Znidaric_Luka_2018.pdf (822,40 KB)
MD5: 680315470993C8CD0FF051647DF74D26
PID: 20.500.12556/dkum/3dd73ee5-2a21-45dc-8d71-a49e02f2c4b4
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FNM - Faculty of Natural Sciences and Mathematics
Abstract:Harmonično barvanje grafa je dobro barvanje njegovih vozlišč, tako da se poljuben par različnih barv pojavi na največ enem paru sosednjih vozlišč. Harmonično kromatično število grafa G je najmanjše število barv, ki jih potrebujemo za harmonično barvanje grafa G. Znano je, da je določitev harmoničnega kromatičnega števila grafa NP-težek problem. V magistrskem delu bo pokazano, da problem ostane NP-težek tudi v primeru dreves. Nadalje bodo obravnavane različne družine dreves, za katere je problem lažje rešljiv. Določene bodo natančne vrednosti harmoničnega kromatičnega števila teh dreves, v nekaterih primerih pa bo opisan tudi polinomski algoritem, ki podano drevo harmonično pobarva z želenim številom barv.
Keywords:drevesa, barvanje grafov, harmonično barvanje
Place of publishing:Maribor
Publisher:[L. Žnidarič]
Year of publishing:2018
PID:20.500.12556/DKUM-72167 New window
UDC:519.172:519.174.7(043.2)
COBISS.SI-ID:24054536 New window
NUK URN:URN:SI:UM:DK:GOM63VKE
Publication date in DKUM:03.10.2018
Views:1255
Downloads:125
Metadata:XML DC-XML DC-RDF
Categories:FNM
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:12.09.2018

Secondary language

Language:English
Title:Harmonious colouring of trees
Abstract:Harmonious colouring of a graph is a proper vertex colouring such that every pair of colours appears on at most one pair of adjacent vertices. The harmonious chromatic number is the minimum number of colours needed for such a colouring. In this master thesis we deal with the problem of finding a harmonious colouring for trees. We research this problem on trees in general and later on trees of specific types. In the first part we focus on the problem in the case of trees in general. We show that the problem of finding the harmonious chromatic number of a tree is NP-hard. In the second part we limit ourselves to the trees of specific types. For trees with these limitations we present better bounds for their harmonious chromatic number. We also present a polynomial algorithm for finding a harmonious colouring for some of those trees.
Keywords:trees, graph colouring, harmonious colouring


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