English

$2$-distance list $(\Delta+2)$-coloring of planar graphs with girth at least 10

Combinatorics 2021-09-30 v1 Discrete Mathematics

Abstract

Given a graph GG and a list assignment L(v)L(v) for each vertex of vv of GG. A proper LL-list-coloring of GG is a function that maps every vertex to a color in L(v)L(v) such that no pair of adjacent vertices have the same color. We say that a graph is list kk-colorable when every vertex vv has a list of colors of size at least kk. A 22-distance coloring is a coloring where vertices at distance at most 2 cannot share the same color. We prove the existence of a 22-distance list (Δ+2\Delta+2)-coloring for planar graphs with girth at least 1010 and maximum degree Δ4\Delta\geq 4.

Keywords

Cite

@article{arxiv.2109.14499,
  title  = {$2$-distance list $(\Delta+2)$-coloring of planar graphs with girth at least 10},
  author = {Hoang La and Mickael Montassier},
  journal= {arXiv preprint arXiv:2109.14499},
  year   = {2021}
}

Comments

14 pages, 13 figures. arXiv admin note: substantial text overlap with arXiv:2106.03587, arXiv:2103.11687, arXiv:2105.01684, arXiv:2109.11927