Hostname: page-component-76fb5796d-x4r87 Total loading time: 0 Render date: 2024-04-25T19:36:22.713Z Has data issue: false hasContentIssue false

List Improper Colourings of Planar Graphs

Published online by Cambridge University Press:  01 May 1999

R. šKREKOVSKI
Affiliation:
Department of Mathematics, University of Ljubljana, Jadranska 19, 1111 Ljubljana, Slovenia (e-mail: riste.skrekovski@FMF.Uni-Lj.Si)

Abstract

A graph G is m-choosable with impropriety d, or simply (m, d)*-choosable, if for every list assignment L, where [mid ]L(v)[mid ][ges ]m for every vV(G), there exists an L-colouring of G such that each vertex of G has at most d neighbours coloured with the same colour as itself. We show that every planar graph is (3, 2)*-choosable and every outerplanar graph is (2, 2)*-choosable. We also propose some interesting problems about this colouring.

Type
Research Article
Copyright
1999 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)