🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPortuguêsSvenskaTiếng ViệtРусскийالعربية한국어中文日本語EntityQ49938· pop 20Peano arithmeticAlso known as PAaxiomatic theory of the arithmetic of nonnegative integersAvailable in 20 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoBahasa IndonesiaBelarusianCatalanConnectionsPeano axiomsEntity