The semi-chromatic number of a graph

The Sigma Chromatic Number of a Graph

✍ Gary Chartrand; Futaba Okamoto; Ping Zhang 📂 Article 📅 2010 🏛 Springer Japan 🌐 English ⚖ 307 KB

The star chromatic number of a graph

✍ H. L. Abbott; B. Zhou 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 469 KB 👁 2 views

## Abstract We study a generalization of the notion of the chromatic number of a graph in which the colors assigned to adjacent vertices are required to be, in a certain sense, far apart. © 1993 John Wiley & Sons, Inc.

The chromatic covering number of a graph

✍ Reza Naserasr; Claude Tardif 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 72 KB 👁 2 views

Following [1] , we investigate the problem of covering a graph G with induced subgraphs G 1 ; . . . ; G k of possibly smaller chromatic number, but such that for every vertex u of G, the sum of reciprocals of the chromatic numbers of the G i 's containing u is at least 1. The existence of such ''ch

Asteroidal Chromatic Number of a Graph

✍ S. Arumugam; Hepzibai Jeyakumar 📂 Article 📅 2003 🏛 Elsevier Science 🌐 English ⚖ 185 KB

Graph Union and Chromatic Number

✍ Dirac, G. A. 📂 Article 📅 1964 🏛 Oxford University Press 🌐 English ⚖ 101 KB

On the edge-chromatic number of a graph

✍ Lowell W. Beineke; Robin J. Wilson 📂 Article 📅 1973 🏛 Elsevier Science 🌐 English ⚖ 427 KB