Proposition: Chromatic Number and Maximum Vertex Degree

In a simple graph $G$ with the maximum vertex degree $d$, the chromatic number obeys the following inequality:

$$\chi(G)\le d+1.$$

Proofs: 1


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References

Bibliography

  1. Aldous Joan M., Wilson Robin J.: "Graphs and Applications - An Introductory Approach", Springer, 2000