## Abstract A proper coloring of the vertices of a graph is called a __star coloring__ if the union of every two color classes induces a star forest. The star chromatic number Ο~__s__~(__G__) is the smallest number of colors required to obtain a star coloring of __G__. In this paper, we study the r
Coloring Graphs with Sparse Neighborhoods
β Scribed by Noga Alon; Michael Krivelevich; Benny Sudakov
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 118 KB
- Volume
- 77
- Category
- Article
- ISSN
- 0095-8956
No coin nor oath required. For personal study only.
β¦ Synopsis
It is shown that the chromatic number of any graph with maximum degree d in which the number of edges in the induced subgraph on the set of all neighbors of any vertex does not exceed d 2 Γf is at most O(dΓlog f ). This is tight (up to a constant factor) for all admissible values of d and f.
π SIMILAR VOLUMES
For all \(\varepsilon>0\), we construct graphs with \(n\) vertices and \(>n^{2-n}\) edges, for arbitrarily large \(n\), such that the neighborhood of each vertex is a cycle. This result is asymptotically best possible. "1995 Academic Press. Inc.
The performance of the greedy coloring algorithm ''first fit'' on sparse random graphs G and on random trees is investigated. In each case, approximately n, c r n log log n colors are used, the exact number being concentrated almost surely on at 2 most two consecutive integers for a sparse random gr
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## Abstract We show that every plane graph with maximum face size four in which all faces of size four are vertexβdisjoint is cyclically 5βcolorable. This answers a question of Albertson whether graphs drawn in the plane with all crossings independent are 5βcolorable. Β© 2009 Wiley Periodicals, Inc.