A reduction of propositional tautologihood to the coloring of graphs in three colors
โ Scribed by G. V. Davydov; P. Yu. Suvorov
- Publisher
- Springer US
- Year
- 1977
- Tongue
- English
- Weight
- 287 KB
- Volume
- 8
- Category
- Article
- ISSN
- 1573-8795
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
Bounds are given on the number of colors required to color the edges of a graph (multigraph) such that each color appears at each vertex u at most m(u) times. The known results and proofs generalize in natural ways. Certain new edge-coloring problems, which have no counterparts when m(u) = 1 for all
## Abstract We prove that for any planar graph __G__ with maximum degree ฮ, it holds that the chromatic number of the square of __G__ satisfies ฯ(__G__^2^)โโคโ2ฮโ+โ25. We generalize this result to integer labelings of planar graphs involving constraints on distances one and two in the graph. ยฉ 2002
If the lines of the complete graph K,, are calmed so that no point is on more than +(n -1) lines of the same color or so that each point lies on more than $(5n + 8) lines of different colors, then K,, contains a cycle of length n with adjacent lines having different colors. Let the lines of a graph