Add Erdős Problem 603 (chromatic Property B for intersection ≠ 2)#3776
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henrykmichalewski wants to merge 1 commit intogoogle-deepmind:mainfrom
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Add Erdős Problem 603 (chromatic Property B for intersection ≠ 2)#3776henrykmichalewski wants to merge 1 commit intogoogle-deepmind:mainfrom
henrykmichalewski wants to merge 1 commit intogoogle-deepmind:mainfrom
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…ion ≠ 2 Adds formalization of Erdős Problem 603 (sister problem of 602). Reference: https://www.erdosproblems.com/603 Asks whether every family of sets, any two of which intersect in at most 2 points, has chromatic Property B. Includes HasChromaticPropertyB definition generalizing 602, Komjáth's ≠1 result as context, 4 proved variants, disproof of a misformalization, and sanity checks. Assisted by Claude (Anthropic).
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Closes #822 |
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fixes #822
Problem
Erdős Problem 603: https://www.erdosproblems.com/603 (sister problem of 602)
Contents
erdos_603Assisted by Claude (Anthropic).