teorema de Brooks

Theorem that, with two classes of exceptions, vertex-coloring a graph needs a number of colors at most equal to its maximum degree

In graph theory, Brooks' theorem states a relationship between the maximum degree of a graph and its chromatic number. According to the theorem, in a connected graph in which every vertex has at most Δ neighbors, the vertices can be colored with only Δ colors, except for two cases, complete graphs and cycle graphs of odd length, which require Δ + 1 colors.

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teorema de Brooks

Theorem that, with two classes of exceptions, vertex-coloring a graph needs a number of colors at most equal to its maximum degree

Texto em inglês

In graph theory, Brooks' theorem states a relationship between the maximum degree of a graph and its chromatic number. According to the theorem, in a connected graph in which every vertex has at most Δ neighbors, the vertices can be colored with only Δ colors, except for two cases, complete graphs and cycle graphs of odd length, which require Δ + 1 colors.

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In graph theory, Brooks' theorem states a relationship between the maximum degree of a graph and its chromatic number. According to the theorem, in a connected graph in which every vertex has at most Δ neighbors, the vertices can be colored with only Δ colors, except for two cases, complete graphs and cycle graphs of odd length, which require Δ + 1 colors. The theorem is named after R. Leonard Brooks, who published a proof of it in 1941. A coloring with the number of colors described by Brooks' theorem is sometimes called a Brooks coloring or a Δ-coloring.

Texto: Wikipédia em inglês, CC BY-SA 4.0. · Imagem: Vectorisation: BethNaught. Original: Claudio Rocchini (User:... (CC BY 2.5) ·

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