Petrosyan Petros ; Toftc Bjarne
A proper edge coloring f of a graph G with colors 1,2,3,…,t is called an interval coloring if the colors on the edges incident to every vertex of G form an interval of integers. The coloring f is cyclic interval if for every vertex v of G, the colors on the edges incident to v either form an interval or the set {1,…,t}∖{f(e):e is incident to v} is an interval. A bipartite graph G is (a,b)-biregular if every vertex in one part has degree a and every vertex in the other part has degree b; it has been conjectured that all such graphs have interval colorings. We prove that every (3,5)-biregular graph has a cyclic interval coloring and we give several sufficient conditions for a (3,5)-biregular graph to admit an interval coloring.
oai:noad.sci.am:136100
սեղմել այստեղ՝ կապին հետևելու համար
carl.johan.casselgren@liu.se ; pet_petros@ipia.sci.am ; btoft@imada.sdu.dk
Linköping University ; Yerevan State University ; University of Southern Denmark
May 3, 2021
Apr 19, 2021
22
https://noad.sci.am/publication/149559
Հրատարակության անուն | Ամսաթիվ |
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Carl Johan Casselgren, On interval and cyclic interval edge colorings of (3,5)-biregular graphs | May 3, 2021 |
Casselgren Carl Johan Khachatrian Hrant Petrosyan Petros