## Abstract We show that every plane graph with maximum face size four in which all faces of size four are vertex‐disjoint is cyclically 5‐colorable. This answers a question of Albertson whether graphs drawn in the plane with all crossings independent are 5‐colorable. © 2009 Wiley Periodicals, Inc.
Cyclic coloring of plane graphs
✍ Scribed by Oleg V. Borodin
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 637 KB
- Volume
- 100
- Category
- Article
- ISSN
- 0012-365X
No coin nor oath required. For personal study only.
✦ Synopsis
Borodin, O.V., Cyclic coloring of plane graphs, Discrete Mathematics 100 (1992) 281-289. Let G be a plane graph, and let x,(G) be the minimum number of colors to color the vertices of G so that every two of them which lie in the boundary of the same face of the size at most k, receive different colors. In 1966, Ore and Plummer proved that x,(G) s 2k for any k 3 3. It is also known that x3(G) 6 4 (Appel and Haken, 1976) and x4(G) c 6 (Borodin, 1984). The result in the present paper is: q(G) c 9, x6(G) s 11, X,(G) s 12, and+(G) ~2k -3 if k 2 8.
📜 SIMILAR VOLUMES
A sequence r 1 , r 2 , . . . , r 2n such that r i = r n+i for all 1 ≤ i ≤ n is called a repetition. A sequence S is called non-repetitive if no block (i.e. subsequence of consecutive terms of S) is a repetition. Let G be a graph whose edges are colored. A trail is called non-repetitive if the sequen
The edges and faces of a plane graph are colored so that every two adjacent or incident of them are colored differently. The minimal number of colors for this kind of coloring is estimated. For the plane graphs of the maximal degree at least 10, the bound is the best possible. The proof is based on
An edge-face coloring of a plane graph with edge set E and face set F is a coloring of the elements of E ∪F so that adjacent or incident elements receive different colors. Borodin [Discrete Math 128(1-3): [21][22][23][24][25][26][27][28][29][30][31][32][33] 1994] proved that every plane graph of max
## Abstract A __polychromatic k__‐__coloring__ of a plane graph __G__ is an assignment of __k__ colors to the vertices of __G__ such that every face of __G__ has __all k__ colors on its boundary. For a given plane graph __G__, one seeks the __maximum__ number __k__ such that __G__ admits a polychro
## Abstract A face of an edge‐colored plane graph is called __rainbow__ if the number of colors used on its edges is equal to its size. The maximum number of colors used in an edge coloring of a connected plane graph __G__with no rainbow face is called __the edge‐rainbowness__ of __G__. In this pap