Article ID Journal Published Year Pages File Type
4656946 Journal of Combinatorial Theory, Series B 2013 7 Pages PDF
Abstract

Thomassen conjectured that every triangle-free planar graph on n   vertices has exponentially many 3-colorings, and proved that it has at least 2n1/12/20000 distinct 3-colorings. We show that it has at least 2n/212 distinct 3-colorings.

Keywords
Related Topics
Physical Sciences and Engineering Mathematics Discrete Mathematics and Combinatorics
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