๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Maximal chromatic polynomials of connected planar graphs

โœ Scribed by Ioan Tomescu


Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
429 KB
Volume
14
Category
Article
ISSN
0364-9024

No coin nor oath required. For personal study only.

โœฆ Synopsis


Abstract

In this paper we obtain chromatic polynomials of connected 3โ€ and 4โ€chromatic planar graphs that are maximal for positive integerโ€valued arguments. We also characterize the class of connected 3โ€chromatic graphs having the maximum number of pโ€colorings for p โ‰ฅ 3, thus extending a previous result by the author (the case p = 3).


๐Ÿ“œ SIMILAR VOLUMES


Maximal ฯƒ-polynomials of connected 3-chr
โœ Ioan Tomescu ๐Ÿ“‚ Article ๐Ÿ“… 2003 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 113 KB

## Abstract In the set of graphs of order __n__ and chromatic number __k__ the following partial order relation is defined. One says that a graph __G__ is less than a graph __H__ if __c__~__i__~(__G__) โ‰ค __c__~__i__~(__H__) holds for every __i__, __k__ โ‰ค __i__ โ‰ค __n__ and at least one inequality is

Maximum chromatic polynomials of 2-conne
โœ Ioan Tomescu ๐Ÿ“‚ Article ๐Ÿ“… 1994 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 345 KB

## Abstract In this paper we obtain chromatic polynomials __P(G__; ฮป) of 2โ€connected graphs of order __n__ that are maximum for positive integerโ€valued arguments ฮป โ‰ง 3. The extremal graphs are cycles __C__~__n__~ and these graphs are unique for every ฮป โ‰ง 3 and __n__ โ‰  5. We also determine max{__P(

On the connectivity of maximal planar gr
โœ S. L. Hakimi; E. F. Schmeichel ๐Ÿ“‚ Article ๐Ÿ“… 1978 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 254 KB ๐Ÿ‘ 1 views
Star chromatic numbers of some planar gr
โœ Gao, Guogang; Wang, Yiju; Zhou, Huishan ๐Ÿ“‚ Article ๐Ÿ“… 1998 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 173 KB ๐Ÿ‘ 2 views

The concept of the star chromatic number of a graph was introduced by Vince (A. Vince, Star chromatic number, J. Graph Theory 12 (1988), 551--559), which is a natural generalization of the chromatic number of a graph. This paper calculates the star chromatic numbers of three infinite families of pla

The star-chromatic number of planar grap
โœ Moser, David ๐Ÿ“‚ Article ๐Ÿ“… 1997 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 127 KB ๐Ÿ‘ 2 views

The star-chromatic number of a graph, a parameter introduced by Vince, is a natural generalization of the chromatic number of a graph. Here we construct planar graphs with star-chromatic number r, where r is any rational number between 2 and 3, partially answering a question of Vince.

Edge-reconstruction of 4-connected plana
โœ S. Fiorini; J. Lauri ๐Ÿ“‚ Article ๐Ÿ“… 1982 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 482 KB ๐Ÿ‘ 1 views

## Abstract The object of this paper is to show that 4โ€connected planar graphs are uniquely determined from their collection of edgeโ€deleted subgraphs.