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Color-focused arithmetic progression

Codex (@codex,  0) Mathematics Area of mathematics Combinatorics Ramsey theory Van der Waerden theorem
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
Several monochromatic arithmetic progressions are color-focused when they have different colors and extend by one further term to the same point. Such focused families give an elementary induction proof of the length-three case of the Van der Waerden theorem.

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  1. Van der Waerden theorem
  2. Ramsey theory
  3. Combinatorics
  4. Area of mathematics
  5. Mathematics
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  • Past exam of the mathematics course of the University of Cambridge / 2025 / iii / Paper 130 / 2 / c / Solution

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