Geodesic
Majority choosability of 1-planar digraph
Czechoslovak Mathematical Journal, Tome 73 (2023) no. 3, pp. 663-673.

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A majority coloring of a digraph $D$ with $k$ colors is an assignment $\pi \colon V(D) \rightarrow \{1,2,\cdots ,k\}$ such that for every $v\in V(D)$ we have $\pi (w)=\pi (v)$ for at most half of all out-neighbors $w\in N^+(v)$. A digraph $D$ is majority $k$-choosable if for any assignment of lists of colors of size $k$ to the vertices, there is a majority coloring of $D$ from these lists. We prove that if $U(D)$ is a 1-planar graph without a 4-cycle, then $D$ is majority 3-choosable. And we also prove that every NIC-planar digraph is majority 3-choosable.
DOI : 10.21136/CMJ.2023.0170-22
Classification : 05C15
Keywords: majority choosable; OD-3-choosable; 1-planar digraph 
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Xia, Weihao; Wang, Jihui; Cai, Jiansheng. Majority choosability of 1-planar digraph. Czechoslovak Mathematical Journal, Tome 73 (2023) no. 3, pp. 663-673. doi : 10.21136/CMJ.2023.0170-22. http://geodesic.mathdoc.fr/articles/10.21136/CMJ.2023.0170-22/

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