🌐EnglishEnglishEspañolFrançaisPolskiPortuguêsSvenskaTürkçeРусский中文日本語EntityQ7137494· pop 8· linked from 19 articlesParis–Harrington theoremcertain principle in Ramsey theory is true, but not provable in Peano arithmeticConnectionsGödel's incompleteness theoremsEntityInternational Standard Book NumberEntityCategoriesIndependence resultsTheorems in the foundations of mathematics