Graph Coloring and Ramsey Theory

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Each question is graded on a single answer: a check that this chapter's methods work, not a test of the reasoning behind them.

Compute ⁠, the chromatic number of the complete graph on vertices.

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About these 109 questions

Colouring vertices and edges, the chromatic number and its bounds, and the Ramsey results that make disorder impossible. This set covers the chapter Graph Coloring and Ramsey Theory in Combinatorics: 35 easy, 54 medium and 20 hard questions, each graded instantly with a hint and a full step-by-step solution. Progress is saved in this browser only.