## Abstract The vertices of each plane triangulation without loops and multiple edges may be colored with 11 colors so that for every two adjacent triangles [__xyz__] and [__wxy__], the vertices __x__,__y__,__w__,__z__ are colored pairwise differently.
On Diagonally 10-Coloring Plane Triangulations
β Scribed by Daniel P. Sanders; Yue Zhao
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 440 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0364-9024
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
This article shows that the vertices of a plane triangulation may be colored with 10 colors such that every pair of vertices has different colors if they are either adjacent or diagonal, that is, that they are not adjacent but are adjacent to two faces which share an edge. This improves a result of Borodin, who showed that 11 colors were sufficient. Β© 1996 John Wiley & Sons, Inc.
π SIMILAR VOLUMES
## Abstract Simultaneous diagonal flips in plane triangulations are investigated. It is proved that every triangulation with __n__ββ₯β6 vertices has a simultaneous flip into a 4βconnected triangulation, and that the set of edges to be flipped can be computed in $\cal O$(__n__) time. It follows that
## Abstract We show that every plane graph of diameter 2__r__ in which all inner faces are triangles and all inner vertices have degree larger than 5 can be covered with two balls of radius __r__. Β© 2003 Wiley Periodicals, Inc. J Graph Theory 44: 65β80, 2003
Consider a class P of triangulations on a closed surface F 2 , closed under vertex splitting. We shall show that any two triangulations with the same and sufficiently large number of vertices which belong to P can be transformed into each other, up to homeomorphism, by a finite sequence of diagonal
It will be shown that any two triangulations on a closed surface, except the sphere, with minimum degree at least 4 can be transformed into each other by a finite sequence of diagonal flips through those triangulations if they have a sufficiently large and same number of vertices. The same fact hold
In 1973, Kronk and Mitchem (Discrete Math. (5) 255-260) conjectured that the vertices, edges and faces of each plane graph G may be colored with D(G) + 4 colors, where D(G) is the maximum degree of G, so that any two adjacent or incident elements receive distinct colors. They succeeded in verifying