scholarly journals Every Plane Graph is Facially-Non-Repetitively $C$-choosable

10.37236/7129 ◽  
2018 ◽  
Vol 25 (1) ◽  
Author(s):  
Grzegorz Gutowski

A sequence $\left(x_1,x_2,\ldots,x_{2n}\right)$ of even length is a repetition if $\left(x_1,\ldots,x_n\right) =\left(x_{n+1},\ldots,x_{2n}\right)$. We prove existence of a constant $C < 10^{4 \cdot 10^7}$ such that given any planar drawing of a graph $G$, and a list $L(v)$ of $C$ permissible colors for each vertex $v$ in $G$, there is a choice of a permissible color for each vertex such that the sequence of colors of the vertices on any facial simple path in $G$ is not a repetition.

2012 ◽  
Vol 21 (14) ◽  
pp. 1250129 ◽  
Author(s):  
SHUYA LIU ◽  
HEPING ZHANG

In this paper, we associate a plane graph G with an oriented link by replacing each vertex of G with a special oriented n-tangle diagram. It is shown that such an oriented link has the minimum genus over all orientations of its unoriented version if its associated plane graph G is 2-connected. As a result, the genera of a large family of unoriented links are determined by an explicit formula in terms of their component numbers and the degree sum of their associated plane graphs.


2013 ◽  
Vol 498 ◽  
pp. 76-99 ◽  
Author(s):  
Colin de la Higuera ◽  
Jean-Christophe Janodet ◽  
Émilie Samuel ◽  
Guillaume Damiand ◽  
Christine Solnon

10.37236/6663 ◽  
2017 ◽  
Vol 24 (3) ◽  
Author(s):  
Radoslav Fulek ◽  
Jan Kynčl ◽  
Dömötör Pálvölgyi

We introduce a common generalization of the strong Hanani–Tutte theorem and the weak Hanani–Tutte theorem: if a graph $G$ has a drawing $D$ in the plane where every pair of independent edges crosses an even number of times, then $G$ has a planar drawing preserving the rotation of each vertex whose incident edges cross each other evenly in $D$. The theorem is implicit in the proof of the strong Hanani–Tutte theorem by Pelsmajer, Schaefer and Štefankovič. We give a new, somewhat simpler proof.


2021 ◽  
Vol 28 (4) ◽  
Author(s):  
Marcus Schaefer

We show that a plane graph can be embedded with its vertices at arbitrarily assigned locations in the plane and at most $6n-1$ bends per edge. This improves and simplifies a classic result by Pach and Wenger. The proof extends to orthogonal drawings.


2013 ◽  
Vol 8 (8) ◽  
pp. 1030-1037
Author(s):  
Mingxin Li ◽  
Xiongfei Li ◽  
Jinfeng Zhang

2020 ◽  
Vol 108 ◽  
pp. 29-48
Author(s):  
Guillaume Bagan ◽  
Angela Bonifati ◽  
Benoit Groz
Keyword(s):  

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