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Acyclic 5-choosability of planar graphs without 4-cycles

✍ Scribed by O. V. Borodin; A. O. Ivanova


Book ID
110187492
Publisher
SP MAIK Nauka/Interperiodica
Year
2011
Tongue
English
Weight
327 KB
Volume
52
Category
Article
ISSN
0037-4466

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## Abstract A proper vertex coloring of a graph __G__ = (__V,E__) is acyclic if __G__ contains no bicolored cycle. A graph __G__ is acyclically __L__‐list colorable if for a given list assignment __L__ = {__L__(__v__): __v__:β€‰βˆˆβ€‰__V__}, there exists a proper acyclic coloring ϕ of __G__ such that Ο•(_

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The conjecture on acyclic 5-choosability of planar graphs [Borodin et al., 2002] as yet has been verified only for several restricted classes of graphs. None of these classes allows 4-cycles. We prove that a planar graph is acyclically 5-choosable if it does not contain an i-cycle adjacent to a j-cy

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