Every triangle-free induced subgraph of the triangular lattice is $(5m,2m)$-choosable

Yves Aubry, Jean-Christophe Godin, Olivier Togni

A graph $G$ is $(a,b)$-choosable if for any color list of size $a$ associated with each vertex, one can choose a subset of $b$ colors such that adjacent vertices are colored with d…