🌐EnglishEnglishFrançaisItaliano한국어中文日本語EntityQ864213· pop 7· linked from 332 articlesConservative extensionarea of researchAvailable in 7 languagesFrançais中文日本語ItalianoSlovak한국어via Wikidata sitelinks · CC0Connectionssemantic theory of truthEntitymathematical logicEntityCategoriesMathematical logicModel theoryProof theory