Computer Sciences > GATE 2023 > Graph Theory
Let G be a simple, finite, undirected graph with vertex set {v1,...,vn}. Let Δ(G) denote the maximum degree of G and let N = {1, 2,...} denote the set of all possible colors. Color the vertices of G using the following greedy strategy: for i = 1,...,n
color(vi) <- min{j ∈ N: no neighbour of vi is colored j}
Which of the following statements is/are TRUE?
A
This procedure results in a proper vertex coloring of G.
B
The number of colors used is at most Δ(G) + 1.
C
The number of colors used is at most Δ(G).
D
The number of colors used is equal to the chromatic number of G.

Correct : a,b

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