Graph Colouring

Which of the following is not a type of graph in computer science?
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What is vertex coloring of a graph?
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In a properly vertex-coloured graph, what can you say about the colours of connected vertices (vertices with an edge between them)?
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A graph G has a chromatic number of 2. What can you conclude about G?
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A friend claims they coloured a graph with 10 vertices and only needed 1 colour. Is this possible?
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What is the minimum number of colors needed to properly color a cycle graph with 5 vertices (C5)?
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What is the chromatic number of a complete graph with n vertices (Kn)?

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In graph coloring, what is Brooks' theorem?
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What is the Mycielski construction and what does it prove about graph coloring?
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