A graph $G$ is equitably $k$-choosable if, for any given $k$-uniform list assignment $L$, $G$ is $L$-colorable and each color appears on at most $\lceil\frac{|V(G)|}{k}\rceil$ vertices. A graph is equitably $k$-colorable if the vertex set $V(G)$ can be partitioned into $k$ independent subsets $V_1$, $V_2$, $\cdots$, $V_k$ such that $||V_i|-|V_j||\leq 1$ for $1\leq i, j\leq k$.
In this paper, we prove that if $G$ is a planar graph without chordal $4$- and $6$-cycles, then $G$ is equitably $k$-colorable and equitably $k$-choosable where $k\geq\max\{\Delta(G), 7\}$.

Comment: 21 pages,3 figures

• 05C10 - Planar graphs; geometric and topological aspects of graph theory
• 05C15 - Coloring of graphs and hypergraphs
• 05C38 - Paths and cycles
• 05C70 - Edge subsets with special properties (factorization, matching, partitioning, covering and packing, etc.)